If you accidentally get a blast, don’t panic. Get to fresh air immediately. Breathe deeply (but not near the can). If your coughing won’t stop or you feel like your chest is in a vise, call poison control (1-800-222-1222 in the US). They don’t judge—they’ve heard weirder stuff, like someone trying to fix a guitar with mayonnaise.
Drink some water. Sit still. And never induce vomiting—that just brings the chemical back up for round two, which is worse.