Does this happen at anyone else's house?

There's a young boy child that's racing around the house, buck naked and holding his underwear in his little hands.  He's running and yelling "I'm naked!" as fast as he can while giggling maniacally.  Of course, his elder brother is mortified at this behavior and telling him to stop running around naked, which just encourages the little rascal more.  His father and I are just sitting here watching the show.  Does this happen to anyone else?