Weird thing is, I get that numbness only when I play my TWD. I don't think my stance or style is any different than any other games I've played over the years, including my current games, but maybe it's how intense the games are.
Other pinball injury...tore both biceps unloading a TZ from my truck by myself. Right arm completely tore and the left arm tore partially. Two surgeries in a two-month period. That was a year ago. Left arm is still pretty numb from elbow to wrist because scar tissue built up during the two month wait. The doctor had to move some nerves around to do the surgery.
I had unloaded many games by myself in the past, but this TZ was loaded in my truck backwards (head toward tailgate). I had to try a different method, but it didn't work out so well.