Revealing mistake: When the Hotel manager walks in the recently vacated room, we see the piano collapse. If you look closely, you can tell that the front two legs were just pulled back under the piano causing it to collapse.
Bachelor Party (1984)
1 revealing mistake
Directed by: Neal Israel
Starring: Tom Hanks, Tawny Kitaen, Adrian Zmed, George Grizzard
Continuity mistake: In one scene, Tom Hanks leaves a room while the last part of "Something Isn't Right" by Oingo Boingo is playing. When he reenters the room, the middle of the song is playing.
Mrs. Thompson: Is that the foot-long?
Nick: And then some.
Chosen answer: It's showing he's sexually adventurous, as he's using a cooking appliance as a sex toy.