What's the ep called in which [holy grail?]
... the episode where Louis and his dad are arguing about something in the garage and they fall through a hole in the wall? Then they find themselves in an indiana jones type of tomb and there is something on an altar. Louis says it must be booby trapped so they decided to pick it up and put something of equal weight on top of it at the same time. Attempting to do this, the whole tomb begins to collapse and they run out of the hole and back into the garage.