When The Thing is on the airplane, he tells a gentlemen that he is in his seat. You also see a black women seated in the window seat, when they change seats you see the black women's hair partially, still at the window seat. When Ben (The Thing) is seated the women is completely gone absent from the shot, then in another shot is back. [She stood up when Ben sat down, he even looks at her apologetically right before the shot changes.]

In the scene where Johnny Storm and Reed Richards are arguing about having a bachelor party, you can hear Johnny call REED "John". [Johnny doesn't call Reed "John". Johnny says "John" because he's correcting Reed. Johnny says afterwardss that he would like to be called John not Johnny, so that's why he says it.]

When the fantastic four are in The Black Forest in Germany, The Thing encounters a bear. This is highly unlikely as the last documented bear sighting (aside from the brown bear named Bruno in 2006, who was shot and killed) was 170 years ago. http://news.nationalgeographic.com/news/2006/05/060523-bear-germany.html. [Highly unlikely does not mean impossible. And if there was a sighting as late as 2006, there is no reason why there could not be another bear in the region.]

When Invisible Girl sneaks out to see the Silver Surfer on her own, she is able to go through the glass door without opening it. This is not possible seeing as she can go invisible, and not completely disappear. [She sneaks in an open door, not through a wall.]

Towards the end of the movie, the Silver Surfer enters the cloud of the entity to destroy it. It is so close to the Earth it is surrounding it and the explosion is so enormous it would have knocked the planet of its orbit at the very least, yet not a thing happens and even the electricity comes back on instantly. [This is a comic book world, and I don't think we can be expecting physics to apply normally.]

When the hole appears in the Thames, it supposedly empties out the river, which would be impossible as water would still be coming from the source and water would also fill in from the sea into which it empties. [It doesn't empty out the river. The Silver Surfer can alter matter at the atomic level - he changes the water to dry land.]

When Johnny and Ben are getting ready for the wedding, we can see that Johnny has only a t-shirt under his dress shirt. Yet after he chases the Silver Surfer and falls to Earth, he now has on his FF costume. [The FF group almost ALWAYS have their costumes underneath their "normal" clothes, Johnny most of all because he might have to burn off his clothes at a moment's notice. You never see that he's *not* wearing his outfit underneath his tux and t-shirt.]

The final battle occurs in China. Yet at Reed and Sue's wedding all of the women, including Sue, are wearing kimonos, a traditional garment of Japanese origin. [Just because the battle took place in China, doesn't mean the wedding does. Not only the dresses but also the garden they're in points to the fact that they have moved to Japan for the wedding.]

In the beginning, a news reporter is saying that some believe the Suruga Bay in Japan froze over due to volcanic activity, although such activity had never been reported before. While this in itself is already a completely mindless statement (Why would something that supposedly never happened be considered the most likely cause for the event?), it is also wrong. In the background of the Suruga Bay Shot you can see Mt. Fuji, which is in fact a volcano. Furthermore, the Suruga Bay lies in the subduction zone of two continental plates, which causes considerable seismic activity and makes potential volcanic activity rather likely. [Since when do news reporters always make factual statements in the real world?]

In the London scene where Reed ties the ferris wheel in place he accidentally touches Johnny and inherits his power. However, when they switch back again Reed still has his body suit intact even though it was enough to burn Sue naked earlier in the movie. The capability of their suits are only immune to their specific powers. [It is obvious that after they learned that Johnny could swap powers, they changed all their suits to be flame resistant, just in case they came in contact with him.]

At the beginning of the movie there is a mystery vehicle hidden in the lab of Reed Richards (plastic man). He designed this and no one knows anything of it. Later on in the movie, it is revealed and the fantastic four go for a ride in it. The vehicle breaks apart into three flying machines and despite no one else having any previous knowledge of the vehicle, each team member is able to expertly fly their own section of the craft. [Flight controls are pretty similar across the board. It's not a stretch to assume they all know how to fly a plane. I landed a plane my first time in a cockpit.]

Throughout the movie Johnny is "unstable" and switches powers with the rest of the group. However, at the end when he takes the powers of the others, he doesn't lose his flame abilities as he should have. [Since we do not know the exact mechanism by which the switch takes place, we cannot know what will happen when all four of them touch at the same time. In addition, Reed might have calculated or guessed, off screen, that by all four of them touching, Johnny would absorb their powers and keep his own.]

The Human Torch's run-in with the Silver Surfer allows him to somehow switch powers with the other members. However the scene in which Johnny uses all four members powers should not be possible because inherent in switching powers is the required giving up of his own. [Since we do not know the exact mechanism by which the switch takes place, we cannot know what will happen when all four of them touch at the same time. In addition, Reed might have guessed, off screen, that by all four of them touching, Johnny would absorb their powers and keep his own.]

In the first movie, we're told that the suits the FF4 wear have absorbed the same abilities that they do, which is why the torch doesn't burn his outfit, and is why when he switched powers with Susan, after the fiasco ends she is left sans clothing. However, in the airplane scene when Reed eyes the open overhead compartment to place his luggage, when he stretches his arm to place it there, you see his arm along with the suit and shirt stretch too. Given the previous explanation, only his arm should have stretched. [Reed (being a brilliant scientist and all) quite probably made himself special fabric that stretched as he did. It's a pretty important thing for him to be able to strech at a moment's notice. Also, this happens several other times in the movie (like when he's working on his equipment right before his wedding), so it's not like it's just one isolated time.]