Really.
'shrooms are great. But, they can be a killer. One year we were out picking. Some ahole couldn't resist wolfing one (safe variety) down right in the field. It lodged in his windpipe. A quick Heimlich solved that. I simply told him to stick with commonsense - bag 'em, rinse 'em and enjoy AND don't inhale while plopping them in your mouth.
IMHO. Heimlich, CPR, basic med skills and commonsense are mandatory skills to have before leaving the house. Come to think of it, good stuff to have under your belt around the house.