"In Scrubs the Janitor almost never read his script and just improvised his role. Bill Lawrence actually said that in the scripts, he had "whatever Neil says" on his lines."

"An actual robber was fleeing a drug store (or some such similar establishment) and turned the corner onto the set of the finale of Leon (The Professional), in which Leon's building is completely surrounded by cops. Upon seeing an army of actors dressed as policemen, the robber immediately surrendered."