Have a playfield drop into the cabinet.

Work on machines with your wrist in a cast that knocks the above mentioned playfield into the cabinet.

Work on machines with either shoulder in a restraining sling designed so that your shoulder and elbow stays immobilised. Hey, why not: you are off of work because of those pesky rotator cuff repairs so you might as well try to restore a few pinballs

Bring a new in box/carton machine into your house by yourself. Sure, its sitting on a pallet in your driveway and you have a dolly and besides, no one is available to help you. You have just got to get this machine up and going. So yes, of course, put it on the dolly by yourself, haul it up a flight of stairs and then proceed to assemble the machine.

Use car jacks to assemble the above. Who needs help?