Sarcastic/friendly joke turns into an educational ride!

One night while I was on the Skytrain going to meet a friend, a man walked on at one station carrying a guitar case and what appeared at first glance to be an amp. He sat next to me.

"Let me guess," I said. "You play drums?" I smiled/smirked at him in a friendly way.

I expected him to laugh, but instead he answered, in complete seriousness, "Yes, sometimes. Usually the guitar, but sometimes I play this." He spoke with a thick South American accent, and pointed at the wooden box he had in front of him.

Turns out it was a Peruvian drum, called the cajón.

It was very nicely made, kind of looks like a kleenex box if you turn it with the hole on top. He told me that you play it by tapping/hitting the front face of it, akin to a bongo drum, and the sound comes out the hole on the opposite side.

You learn something new every day!