Maybe you've seen this, maybe not. Very funny looking though:

If you get the mole, don't use the stairs up to get to Sam and Max. Use the chimney instead and into the attic. Go down to the first floor and Bernard will moonwalk (probably a glitch) to room 101 :D

Edit: Ok, I tried to do it again and this time he walked the right way. Maybe you have to be fast, dunno :-/

We've seen this one two times, too. A rare one. If you come up with a recipe to reproduce this, let us know!