Here's a clip of a 64-year-old Buddy Rich playing at "Concert for the Americas" in 1982. He goes absolutely ham on the kit throughout his performances at the concert, but this song is particularly famous: the urban legend has it that he began suffering a heart attack while playing.
People point to the moment about 6 minutes in when you can start to see him really exhausted. He leaves the stage pretty quickly after this and apparently was taken straight to hospital. It's confirmed that he was recovering from a heart attack in 1983, so who knows. It's a stunning performance either way.
If you like this stuff I really recommend checking out the album "Just in Time: The Final Recording" – it was released a few years ago but was the final recording of a Buddy Rich concert at Ronnie Scott's in London. There's some great moments in it, like when he gets his daughter on stage to sing while he plays. An amazing performer.