It is concerned with the safety of the one getting the piledriver. The Tombstone Piledriver is performed by wrapping the receiver's arms around The Undertaker's waist as he keeps hold of the receiver's waist while being lifted upside down by The Undertaker. At some point during the move, both men will release their holds on each other, at which point gravity will take its toll and both men will be sent crashing to the ground. The name "tombstone piledriver" comes from the fact that when The Undertaker performs it, he often piles stones or dirt on top of his victim before dropping them on top of them. This is meant to represent a grave site, and also gives weight to the fact that this is a serious injury-inducing move. There have been several deaths due to accidents involving people who were caught in the pileup resulting from a Tombstone Piledriver. One such case was that of Dave Taylor, who died after being piled up by The Undertaker at Survivor Series 1997. Another example includes Scott Steiner, who was pinned by The Undertaker at Vengeance 2001 and killed when The Undertaker dropped him on his head. The move has been banned by World Wrestling Entertainment since August 2006 because of its fatal potential. Before being banned, The Undertaker had used it on more than one occasion, most notably at WrestleMania 23 where he used it on Shawn Michaels.