Ive never done that either and still don't know how. They do it on Catfish all the time.
I'm not sure what "on Catfish" is, but my hubby eats them. You can tape him doing that for our show. It will be original but still familiar. I posted my thoughts about it in another thread. I can pretty much guarantee he won't mind you filming him. He'll turn around periodically and ask things about what you did with the tool he was just about to use, then you'll say you don't know anything about it, then he'll come ask me what I know about it.