Take a Minute to Appreciate the 10 Funniest Fresh Prince of Bel-Air Moments

Nothing is worse than accidentally walking in on one of your parents doing the deed. That's exactly what happens to Will in the season five finale, "For Whom the Wedding Bells Toll." If getting cold feet about marrying Lisa wasn't enough, he happens upon his mother and Lisa's father in bed together, causing him to yell, "Mama no!"