S4·E5 Journey to the Center of the Nursery

After Fozzie's skate key falls down the air vent the kids go looking for it. The kids use the closet as an elevator. At each level they go down they find stranger and stranger things. The reason it's so important that Fozzie find his skate key is because he's still wearing his skates! He can't get them off! Throughout the episode Fozzie goes wheeling and sliding all over the place!