Moviefone's 12 Craziest Teen Moments (12 movies items)
"Unwanted Mommy Kisses
Traveling back in time is a crazy enough experience for anyone, but going back to when their mom was in high school can only give way for even weirder things. When Marty (Michael J. Fox) travels back to 1955, he meets his teenage mom, Lorraine (Lea Thompson), and she begins to crush on him. In an uncomfortable moment, Lorraine flirts with her future son and then, yep, goes in for a kiss. If you ever build a time machine, avoid hanging out with your parents."