Corrected entry: During the final dance scene, a blonde guy pops out of the crowd to do a solo dance. While he is dancing, there are random shots of the crowd cheering. During one of those crowd shots you can spot the young man cheering himself on. (01:38:10)
Corrected entry: At the end when Ren and Willard are fighting the guys outside the dance, they get noticeably dirty. When Ren returns to the dance, his clothes are clean.
Corrected entry: When Ren and Chuck are playing chicken in the end and Chuck bails out, he falls into water. However, when it zoomed out when they first start moving, there was no water visible in the scene.
Corrected entry: How is it that, in a town where dancing has been forbidden for years, at the end of the movie, everyone's able to crank out the newest, most popular dance moves flawlessly?