When Langston, Nick and Catherine are in the lab talking about finding Pauly Krill's killer, Langston puts down the metal tube in his hand twice on top of the safe Nick was welding.
After Paulie blows the door off the safe, he's about 18 inches off the ground with the door holding him up (obviously impaled with it). If this were the case, there's no way his feet would be moving. He'd be paralyzed from that point in his back down, at the very least.