214 - Zacks

One of my students is playing an arrangement of Cantina Band (from Star Wars). He commented that the composer (John Williams) and arranger (John Brimhall) had similar *last* names.
Me: Well...I guess. Their first names are the same too though. So is mine [I point to where all three of our names are listed on the cover page].
Student: Whoa, you're all named John.
Me: Yeah, it is a really common name though.
Student: Are...are John's going to take over the world? And eliminate all the Mikes, and then all the Steves? 
Me: ...no...
Student: What about all the Henrys and Zacks?
Me: Well, I know some pretty cool Zacks, so definitely not them.
Student: How do you know they [Zacks] are not all laying in bed awake at night wondering...?