In the 3rd or 4th draft of the first movie, Lorraine asks Marty to the dance, but he rejects her. Doc admonishes him for it because taking her could lead his parents to meet each other at the dance. Marty calls up Lorraine only to discover that she is going with Biff. To get Biff to break the date, Marty does the alien thing on him. It would probably be more hilarious with Biff than it is with George.

Yeah, except that the scene was spoiled by someone outing Marty and informing Biff who the "alien" really was.

I think in that same one, Marty got freaked out by seeing a cigarette commercial on TV.