Death by Elephant

" The intelligence, domestication, and versatility of elephants gave them considerable advantages over other wild animals such as lions and bears used as executioners by the Romans. Elephants are more tractable than horses: while a horse can be trained to charge into battle, it will not willingly trample an enemy soldier, and will instead step over him. Elephants will trample their enemies, hence the popularity of war elephants with generals such as Hannibal. Elephants can be trained to execute prisoners in a variety of ways, and can be taught to prolong the agony of the victim by inflicting a slow death by torture or quickly killing the condemned by stepping on the head."

Elephant in this drawing doesn't look too happy about its job.

Also, note:

"Being crushed by captive elephants is also a major occupational hazard for elephant keepers in zoos and circuses;^[29] since the 1990s, this has led some such facilities to replace free contact between elephants and keepers with "protected contact" where keepers remain outside the elephant enclosure.^[30]"