Rizzo: I got so many hickeys, people'll think I'm a leper.
Kenickie: Cheer up! A hickey from Kenickie is like a Hallmark card.
In the soda shop, the waitress turns off the lights with her elbow because her hands are full, but she misses the light switch by 6 inches.
John Travolta made up the "cool dude walk" that Danny uses in the first scenes of filming trying to create a bad boy image.