Breathing Wrong for Thirty Feet: My First Scuba Dive

Over the past three weeks I got to go scuba diving for the first time, then snuba diving the day after. Both were a blast. I also came away with two things I did not expect to be the takeaway. Ear pressure sucks. Asthma makes it much harder to dive. What follows is the long version of those two lines, plus the physics nobody bothered to explain to me at the time.