DYK: Freeze frame fun

I don't think it's been posted in here before (haven't checked the episode capsule or anything) - but watching the Season 2 DVD I noticed that in episode 7F10 (Bart Gets hit by a Car), where Bart is telling his "story" - if you freeze frame the part just before it shows Burns running over Bart, it shows Matt's characters from LIH - but you really need to freeze frame it otherwise you won't see it