That '70s Show S03 E11 Who Wants It More

"Be groovy... be very groovy!"

After an argument, Eric and Donna decide to withhold sex to see who'll cave in first. Red is nearly killed by a falling tree and it changes his whole outlook on life. He starts being nice to people, even Fez, but he soon realizes that that's not who he is. Kelso claims to have seen a UFO.