Also.........
Nothing pisses me off more than reading/watching a story about time travel where the characters are over reacting to time differences.
EXAMPLE... the newest X-Men book where the original X-men are time warped from their teen selves to present day. Young Cyclops can't understand bottled water.... **** you writer. How old is Cyclops supposed to be today? Let's just say 40 shall we? That means young Cyclops (let's make him.... 15 just to be generous) has jumped 25 years into the future.
Making "his time" 1988. You know what they had back in 1988? Bottled water.