rory and jess were studying at luke's and they decided to go for ice-cream....jess was driving rory's car, and a dog/cat/squirrel/some small unspecified animal ran in front of the car, jess swerved to miss it and hit a telegraph pole, rory hit her arm on the dashboard and fractured her wrist.
then lorelai and luke had a big fight about jess being a bad influence on rory and him crashing her car, and then luke drove jess to the bus station and sent him back to nyc.....that's all we know - we didn't actually see jess leave, we just heard miss pattie gossiping about it afterwards....
did you see the one last week about lorelai's graduation? that explained the jess thing a little bit...
i cannot believe that the next episode is the last in the series - the gilmore girls is my favourite show ever!!! it's the only hour of peace and solitude in my whole stress-ridden week - what am i going to do now??? :-( lol
hope that helps
anymore questions, just ask...