Well, whenever Pat Sajack sends Alex Trebec to the torture chamber-type thing, they crush his body under these things that come from the top of the chamber. When the 2 announcers turn to the camera RIGHT AFTER Alex is pulverized, the Chamber (which is in the background behind them) is completely empty and clean. Either they've got a GOOD janatorial crew or the guys behind the clay forgot to put Alex's remains in all copies of the death chamber thingy :)