Ms. Annie Edson Taylor was the first person to go over Niagara Falls successfully in a barrel. She planned her stunt for her 63rd birthday. She made quite a splash, but never did an encore.
71 years earlier, in 1829, a Mr. Sam Patch jumped from the falls and survived, but no barrel was involved.
We Rhinos do not recommend this sort of endeavor. We recognize the Attractions of Lunacy, but We are mostly able to resist temptation. Mostly.