Hardest physical labor I ever did was commercial roofing one summer. That will make you old, quick.

Hardest emotional task, having foster kids and watching the state send them back to their loser parents, knowing they would be abused again. I quit when they threatened me with contempt of court for calling the social worker a stupid @#$#@

Most stressful, chemical plant engineer. 24/7 responsibility, if the plant went down or the product coming out was out of spec, we lost 70k dollars an HOUR. Pressure was ridiculous. Did 3 years and left.