Plot Hole?
I want to start this off by saying I really like this film but the ending is really stupid and doesn't make sense at all! At least to me anyway!
How they all escape is just a big mess which doesn't make sense. Richard Pryor goes through a vent and into a peanut/hot-dog vendor trolley. He gets wheeled over to the van where he gets changed and puts on a disguise. He then risks being caught by walking past the guards to lock himself in the bathroom to aid the other guys by giving them a disguise. The other two guys get into their disguise and they all risk walking past the guards to get to the van. Gene Wilder then goes through the vent and into the peanut/hot-dog vendor trolley and then into the van where they drive off and escape together.
Why didn't they all just use the peanut/hot-dog vendor trolley to escape? Why risk being caught wearing a disguise when they could have all gotten into the peanut/hot-dog vendor trolley 1 by 1 and straight into the van like Gene Wilder and Richard Pryor did. There was no point using the bathrooms to put their disguises on.