I can only think of two times on this show that House has ever laughed, and they’ve both been with Wilson. The first time was when he was in the MRI machine and Wilson was joking over the intercom. The second time was in this episode, after his cane broke and he realized Wilson had done it.
They’ve shown the 221 on the outside of the building but this was the first time I remember seeing his apartment door with a “B” on it.
Me too. It would be fun to have one episode with no patient at all…just the full cast arguing for an hour!
My favorite part was when the elevator opened and he’s checking out her naughty bits for ticks. The father throwing him against the wall and his comment about, “Told you it’d be much more dramatic!” was a true House classic! 
He laughed in the Christmas episode in the first season, although we didn’t hear it–there was his piano version of Silent Night playing.
And he was … with Wilson.
I’d like to see an episode where House suddenly starts smiling, treating everyone with kindness, and they all wonder what the hell is wrong with him–medically speaking, of course.