In Goodfellas, the ‘Am I a clown? Do I amuse you?’ scene, where Tommy DeVito (Joe Pesci) attacks Henry Hill (Ray Liotta) for calling him a ‘funny guy’, was Pesci’s idea. He’d once worked at a restaurant where he got a nasty reply after telling a real-life mobster he was funny, so he suggested it to director Martin Scorsese, and they filmed it without a script to get genuine reactions from the cast. (, )

Kids are more likely to cheat if they think they have a reputation for being smart. Studies show that when children are told they’re really smart for doing well on a test, they’re more likely to cheat in the future so that you’ll keep thinking they’re really smart. However, if you praise them by saying they ‘did really well this time’, they’re more likely to keep working hard so they can ‘do well’ again the next time. (, , )