is this the one where....
Okay, I haven't seen this movie in about 20 years and remember very little about it except for this one scene and want to make sure it is THIS movie that it's in
Near the beginning, they're on the boat and two girls are .... bugging him? .... making faces and someone tells them that if they do that and someone hits them on the back their face will stay like that forever. The two girls don't believe it. After they get off the boat, they makes faces and some other kids walks up behind them, slaps them on the back and they're faces stay that way. Then about three quarters of the way through the movie, they show up again, with their funny faces
Even though I haven't seen the movie in 20 years, I still remember their faces and get the giggles
"What are we suppose to use? Harsh language?" ALIENS