Episode #123 "Water Tower"

The gang climbs the water tower, and Kelso paints a pot leaf on it, but then falls, breaks his arm and ends up in the hospital. Jackie tells Kelso that Hyde is a jerk and not ta good friend for having laughed when he fill off the tower. Kelso starts thinking about it and gets upset with Hyde. Eric goes to his parents' bedroom to talk to them and inadvertently sees them having sex; he's so freaked out that even his sister Laurie, who has a hard time ever being nice to him, tries her best to console him. Eric is so shell shocked and acting so strangely that Kitty's convinced he's on drugs; Donna's also concerned, since he's lost all interest in making out, and she can't figure out what's wrong with him. He confesses that he saw his parents having sex, and she tells him to forget about it; when she was twelve she saw her parents having sex in a hammock. It was gross, but she survived, and so will he. Hyde convinces Kelso that laughing when your friends get hurt is just a guy thing and he should get over it. And Laurie tells her parents what's wrong with Eric.