Here is a last bunch of favorite quotes for you. As always, feel free to add your own!
Belloq: How odd that it should end this way for us after so many stimulating encounters. I almost regret it. Where shall I find a new adversary so close to my own level?
Indiana: Try the local sewer.
Willie: There are two dead people out here!
Indiana: We're going to be two dead people in here! Hurry!
Indiana: Since I've met you I've nearly been incinerated, drowned, shot at and chopped into fishbait.
Professor Henry Jones: You said he had a two day head start. That he would blend in, disappear.
Indiana: Are you kidding me, I made all that up, you know Marcus, he got lost once in his own museum.