When I was a kid the instrumental song Tequila by The Champs was a hit on the radio. During the song, at the break, the band would shout out, “Tequila!”
Like Calvin I too had great diaphragm control. I would swallow air and while I belched would say, “Tequila.”
My cousin Bonnie would just roll with laughter. Even Grandma showed traces of a smile.
I know that there are millions of other Calvins out there who can do the same sort of thing.