This reminds of a friend I had in college. We were assigned to the same group coding an advanced calculator in C. This guy didn't know anything about programming (he was mostly focused on his side biz of selling collector sneakers), so we assigned him to do all the testing, his job was to come up with weird equations and weird but valid way to present them to the calculator. And this dude somehow managed to crash almost all of our iterations except the few last ones. Really put the joke about a programmer, a tester, and a customer walk into a bar into perspective.

I love that he ended up making a very valuable contribution despite not knowing how to program -- other groups would have just been mad at him, had him do nothing, or had him do programming and gotten mad when it was crap or not finished.