Other: In the end of the movie. Mouth goes up to Stef and thanks her for offering to save his life. During the movie, however, Stef never offers to save his life. It is explained somewhere that in one of the deleted scenes, when Stef and Mouth are on the plank she offers to share her breath with him so they can both breathe under water.

Factual error: Two of the huge rocks which plummet from the roof of the cave hit the water and then bob to the surface again. Pumice is the only rock which floats on water, but this rock is white and pumice is grey, and pumice is too light and porous to form cave walls anyway.

Continuity: When Data activates his "slick shoes" on the log bridge, the heels of the shoes pop open to reveal the slick shoes mechanism which starts spraying oil. In the next shot though, they show data walking across the log, the heels of the shoes are intact now, and the oil squirts out of a hole in the back of the heel apparently.

Other: When the Fratellis get out of the water, they show no signs of being wet at all, like when they catch the Goonies near One Eyed Willy.

Continuity: At the end when everyone jumps off the plank, you can see in the background (when Steph 'hits' Ma Fratelli) Chunk jumps off, then in the next shot, he jumps off again.

Continuity: In the pirate ship scene, when the large boulder is falling from the ceiling of the cave into the water, it's splash is humorously small.

Visible crew/equipment: In the scene in the cave where Brand pulls back the rock and the bats fly out, there is a close-up of Mouth, (Corey Feldman) with bats flying in front of his face. You can clearly see the strings attached to the bats.

Continuity: In the scene where they are playing the bone-organ to escape, the Fratellis are climbing the rocks to get to the room where the Goonies are. In one of the rocks there is a metal post (about 8-10 in tall) sticking up. A shot shows one Fratelli brother stick his hand on this post to pull himself up. The immediate next shot shows the same post, but no hand, and no Fratellis.

Continuity: In the bone organ scene, right after Andie plays the second correct note, the floor sections that had fallen out when she made the mistakes are still there, then they disappear again.

Continuity: After Data breaks through the screen door and causes the pile up, the potted plant that was on the table is already lying on the floor in the next shot of Chunk catching the statue, even before it falls and hits the floor.

Audio problem: When they are standing in Mikey's kitchen looking at the map, all you can see is their eyes above the top of the map. Right before it cuts away to the Cyndi Lauper video, the map moves down just enough to see Chunk saying something, but there is no accompanying audio.

Continuity: When Mouth has just finished his Spanish in the scene 'Mouth in Espanol', you can hear a man's voice saying 'Wow'. Listen very carefully, though, because the man's voice speaks while Mrs. Walsh is speaking.

Continuity: In the scene where Mikey, Brand and Mouth are listing the exaggerations Chunk has come up with, Mouth says "And I bet it was even more amazing than the time you ate your weight in Godfather's Pizza." When he gets to the "Godfather's Pizza" bit, it becomes clear that this has been dubbed over the original filmed scene, as his mouth does not match his words in the slightest.

Continuity: All the Goonies get soaked from swimming in the Old Moss Garden wishing well, but when they are seen again in another part of the cave they are all dry, and there is not a sign of being soaked.

Continuity: When you first see Andy's hands being tied, you can see that they are tied fairly tight. Right before she goes off the plank, you'll see that the rope is barely around one wrist. In the next shot as she is going into the water, you can see her holding her elbows with both her hands.

Other: When Chunk opens the cupboard in the Fratelli hideout to get the ice cream, if you look closely at the old dead man he blinks several times between standing upright and falling over.

Continuity: In the opening car chase scene, when Chunk is looking out at the car chase from a cafe he has a burger in his hand that he squishes against the glass. After it cuts away to the racing cars, when it cuts back to him at the window the burger is unsquashed .

Other: In the bone organ scene, when Andy plays her first wrong note, you see Mouth in the next shot and he drops down before the floor even collapses.

Continuity: In the beginning scene of the cop calling out the inmates for their lunch, just as he calls "Hey Turkey." you can see the shadow of the supposedly hanged Jake Fratelli on the right wall. The shadow is totally inconsistent with the design of the cell and position Jake was hanging in.

Plot hole: When Mikey holds the doubloon up from a distance, the two rocks and the lighthouse are a perfect match for the three holes in the coin. If the coin was really from 1632, how could the lighthouse even be in it? Lighthouses weren't made until a LONG time later in the 1800's or so.