What would happen if I picked a booger from one nostril and put it back in the other?

nice question. To answer your question, lol, i do not know to be honest. i do have this "special," if you want to call it so, talent of sticking my tongue up my nostrils, and I have stuck it up one nostril, them into the other nostril, and nothing happened, so I suppose nothing would happen to you.... but the only way to find out is if you try it.... lol