Aside from the occasional paper cut, teaching isn’t risky. I still manage to feel stress about it from time to time.
Besides having nightmares in which I’ve been at school for hours without getting anything accomplished (students keep wandering off, nobody can find their supplies, etc.), I have a deep-seated fear of misspelling a word in an email to parents, or worse, using poor grammar. I imagine filling in my next employment application: “Reason for leaving last job: misplaced modifier.”