I have owned old trucks - '62 Chevy S-10, '60 Dodge, '64 Ford. I certainly have busted some knuckles. Changing the subject a bit- I was seventeen and working at a pizza joint that had a brick pizza oven. Temp was 500 degrees. When it was busy we would have to put some of the pizzas about arm length deep in the oven. If you happened to accidentally touch the top or bottom of oven (it was about 10 -12 inches from top to bottom) Your hand would jerk in the opposite direction. So, by the time you pulled your arm out your hand would have multiple burns. I held the record at 5. This is about burned knuckles.
God thinks it's fun to confuse primates. Larsen's God!