Robert Downey Jr. is hilarious in this.
A lot of his stuff had to be ad-libbed. It's hard to imagine that some of his lines were written on the page that way. But he is very funny here. All his stuff with the girls in the hotel room, "I will hardly pop you without having met your father. Get him on the horn right now!". His restaurant waiter rant, "Actually, it's the fish or nothing!". And his subliminal messages to Johnny, "U.C.C. is your only move. U.C.C. is your evermost groove!" Those are just a few examples.
Anybody else find Downey hilarious in Johnny be Good?