Pretty cool, Jeff!
I talked to Kelly on the phone this morning, and he told me about when he started audio engineering school. He said the instructor asked him what he knew about snare drums. He said "That they're snare drums", which exactly what I would have said. Now, more than twenty-five years later, he can talk knowledgeably about all the different kinds of snare drums, how they're built, how to get the best sounds out of one type or another, which kinds have the best sounds for different styles of music, and he can listen to a song on the radio and tell if any of the instruments, including the drums, were out of tune when they were recorded.
It makes me feel like the guy who looked under the hood of a car and said "Yep, that's an engine!"