He was a 50-ish white man with a Midwestern accent named Bob Dachsauer (not sure of the spelling - it was pronounced “dock-sour”).
He was on the Tonight Show because he held several world records involving balancing things.
E.g., he had balanced - on end - some amazing number of coins (I don’t remember the number, but upwards of a dozen). Not laid flat on top of each other, but standing on their edges. He also held a record for swimming across a pool while holding some number of chairs stacked on top of each other. There were pictures of his various feats of balancing. I can’t recall specifics, but some were pretty harrowing.
He seemed endearingly free of guile. His replies to Carson’s questions were invariably funny, but it wasn’t clear whether he intended it (or even realized it):
Carson: So, how did you get started performing these stunts?
Bob D: Well, uh, I was in college when I began doing these things.
Carson: And where did you go to college?
Bob D: Well, I, uh, went to several different colleges, mostly because I was doing these things.
(It wasn’t clear whether he meant he was neglecting his studies and flunking out, or getting banished for crimes against public safety. Either way, the audience loved it).
When Carson asked him how his name was pronounced, he replied, “Dachsauer - sounds like a strange disease”.
Regarding his occupation: he was a swimming instructor. When Carson asked him how he’d gotten into that line of work, he explained that he’d only learned to swim a couple of years ago, but he liked it so much that he decided to become a swimming instructor.
Anyone ever heard of this charming, well-balanced man? (My google skills were not able to overcome my lack of knowledge of the spelling of his name.)