Other mistake: When Thanos gets pushed over by Bruce, he is shown turning his head to the right whilst on the ground and tells the Avengers they should be grateful. Whilst Thanos was being pushed over in the previous shot, all of the Avengers in the room were shown standing several meters in front of him. If Thanos was lying on the ground with the Avengers standing several meters ahead of him and he was looking to his right, then he would have been looking at the wall and not the Avengers. (00:18:10)
Other mistake: When the remaining Avengers confront Thanos in his compound, Bruce, in the Hulkbuster armour, pushes Thanos to the ground, and lands several meters away from where Bruce is standing. Thanos then gets punched by Bruce, who is standing directly in front of him. There are no footsteps heard of Bruce approaching Thanos before punching him. Bruce was standing a visible distance from Thanos when he pushed him and they are all standing on a wooden floor. No way would Bruce have been able to run up to Thanos without making any audible footsteps before punching him, especially with the huge Hulkbuster armour he is wearing. (00:18:10)
Other mistake: Scott arrives in the park and sees hundreds of memorials listing people who were killed by Thanos. In the first close-up shot shown of one of the memorials, the name Norbert Lamey can be seen five rows from the top on the right hand side. The camera then pans to Scott walking in front of the memorial to the right of it. The name Norbert Lamey can be seen repeated on the opposite side of the memorial Scott stands in front of. (00:24:25)
Suggested correction: He needed to hot-wire the van. It's quite possible he could have left the van for parts (he's seen slamming a Leviathan to the ground) or to protect it. It also could have been an illusion by one of Dr. Strange's people.
DetectiveGadget85
Sorry but the suggested correction makes no sense. For one Dr Strange's people have no idea what Ant-Man looks like, and secondly Ant-Man would have no idea where to get parts from in the middle of a battlefield, let alone know if alien technology would be compatible. Also the time frame given when the scene plays out allows no time for him to leave the van, this is a legitimate mistake.
Dr. Strange's people don't know what Ant-Man looks like? He entered the battle with them long before they went to the van. Earth has had access to the same Leviathan parts since the original Avengers. If Toomes can make wings out of it in Spider-man Homecoming, it's possible he can figure something out. Clint had passed the glove to Black Panther before Ant-Man is seen in the background. There was plenty of time. He also could have been defending the van while they brought the glove.
There is plenty of time for Ant-Man to have left the van and returned to it. As the scenes play out, Ant-Man and Wasp are in the front of the van trying to hot wire it. The film then cuts to the battle for several minutes, as we see the passing off the gauntlet, which includes the brief shot of Giant-Man in the background. A few minutes later the film cuts back to the van and we see Scott opening the rear door of the van. So there's plenty of time for him to have gotten out of the van, saw potential trouble with the Leviathan, turned into Giant-Man to stop it while letting Hope finish activating the tunnel, and then returning to check the final settings. Now, all this raises another question that has to do with the apparent ease Giant-Man has in traversing the battlefield, as in why not just give Scott the gauntlet, have him turn into Giant-Man, take a few steps over to the van, and then shrink back down to take the stones back in time?
Vader47000