The film 'Drive' has one of the coolest intros to any film..

Slight SPOILER on old films 'drive' & 'millions':

But at the end of this swift getaway he melts in with the fans leaving a baseball game.... Clearly the same as the getaway in Danny Boyles film 'millions' based on a book where robbers blend in with Newcastle fans leaving a football/soccer match.

But I imagine this idea has been copied lots of times and originates from something much earlier.