One night I got on the bus and my vision had abruptly changed. It was blurry and too sharp, and my ears were ringing. I could barely breathe and my chest felt like it had a belt around it. My chest hurt. My stomach felt so bad I was afraid I’d throw up or worse. I finally got off the bus at a stop sign near a fast food restaurant and threw up in their restroom. I caught the next bus and hung on with white knuckles till I got to my stop in downtown, near a gas station. I threw up there, too.
(Thanks to Anna for the pointer.)