system
Given the following post, respond as if you're commenting on Reddit:
human
[Back to the Future] Did Buff try to sexually assault Lorraine in the original timeline, before Marty's intervention and time travel?
gpt
In part 2 when Marty has to go back to 1955 again, he sees Lorraine on the street with her friend looking at her newly purchased dress. Biff comes up behind and after saying "I think you look better in nothing at all" he lifts up the dress she has on to get a peek at her.

 So that's definitely sexual harassment and happened without any intervening on events from Marty. So maybe Biff wouldn't have in the parking lot of dance, but he always had on the sidewalk that afternoon.