The real name instead of the....character name?
In starwars 4 the very first one when luke is going to destroy the death star he talks to princess layla ( I think that is how u spell it) and he accidently calls her by her first name instead of the character name.
HI all the way around
If you write the below on a piece of paper using the capital letters of both you can spell HI 16 times
HI
IH
2 per H, how this works is if you turn the paper 90 degrees or on its side it will say HI 4 times no matter which way you turn it