I actually worked on this movie (not a film).
From top to the bottom and beginning to end this one never had a chance.
Burt seemed to be having a bad day - every day. Winkler had trouble keeping Reynolds under control - Burt seemed determined to direct. Every other shot Burt would try to include yet another corny gag - usually one that had worked in one of his previous flicks. Stunt Coordinator/second unit director Glen Wilder did an excellent job but could not make up for the general lack of focus.
The movie is a series of lack luster scenes with characters that no one cares about, spouting lines that should make a third grader cringe. Even a corny gag can work if it is woven into the story but that doesn't happen in this movie.
Absolutely the funniest scene wasn't even filmed - Burt walked in while a fake gut was being strapped on his stunt double - his reaction was...priceless.
I think I'm being generous giving this a 3 out of 10 score and possibly a bit defensive - retch.