Switching gears, elephants are some of the most fascinating and intelligent creatures on this planet. But they can also be extremely dangerous, as we all know. Illustrated by what happened at a zoo in... See More
Switching gears, elephants are some of the most fascinating and intelligent creatures on this planet. But they can also be extremely dangerous, as we all know. Illustrated by what happened at a zoo in missouri. A beloved and experienced trainer killed by an elephant he helped raise. Matt gutman has the story. Reporter: Learned that veteran zoo keeper john bradford was crushed to death by an elephant he had been working with nearly 25 years. The zoo in missouri tells abc news, the 6,000-pound patient trampled bradford as he tried to move her to the yard. Three years ago, bradford acknowledged the risks of working with the biggest animals walking the earth. There's a risk in working at a zoo. But the deal is, you minimize the risks. Reporter: Elephants have been known to charge their keepers and others. This year, one safari turned scary, when their jeep was stormed by one of the massive creatures. All caught on tape. The elephants are majestic. But can be deadly. Historically, elephants are responsible for more injuries and deaths in zoos than any other the other animals. Reporter: Tigers and lions? We saw the potential dangers firsthand friday. She just threw a rock. The elephant was just trying to get attention. With a trunk full of gravel. Her aim is fantastic. She will hit us. Like now. Reporter: Wow. Got a little closer this time. Yeah. We got to leave before it gets close enough. Reporter: As for patience, the zoo said she had been acting hesitant after a member of her herd died earlier this month. Zoo keepers were treating her with care. And said bradford's actions were consistent with policy. For "good morning america," matt gutman, abc news, miami.
This transcript has been automatically generated and may not be 100% accurate.