Searching for an episode

I remember back when this series was on the air, there was funny scene that stayed with me. It had kids I think during a birthday party playing a video game. It was one where you shoot aliens, but instead of invading aliens, the aliens were all "we come in peace, we're here to bring you cures, etc" and the kids still shot them and actually cheered when they died. Then some comedian I think came out of the alien spaceship and the kids barraged him with a bunch of shots.

Anyone know which episode is this scene from?