Worst thing I've done is run the knuckle on the middle finger of my left hand into a vertical bandsaw blade. That sure hurt for a few weeks! Seems to have healed O.K.
But a 4" grinder got me late one afternoon a few years back, when I was grinding the leg of the ROPS on a forklift, it caught on a bracket and kicked back, and got me good on the inside of the middle finger of my right hand. Seems to have come good, but it took a while.
Stupid part is, I wear heavy rigger gloves anytime I'm using a grinder, and I took them off half an hour before to do some fine finger work, and forgot to put them back on, when I picked up the grinder again.
I must be one of the rare, or very wary ones, who's spent all their life around machinery, engines and heavy equipment - and I still have all my fingers, and they still all work O.K.
I know so many guys who have digits missing, who've had hands caught in moving equipment, and who are even missing arms or parts of arms.
The brothers boss had his entire right hand crushed into mince meat when a blade dropped on it.
Stupid part about his accident was they were chaining for clearing and kept pulling D-shackles apart - so they had to be bent back into their proper U-shape.
They were dropping the (cable) blade on the bent shackle, but it kept falling over - so his boss says, "I'll just hold it, while you drop the blade on it again!"
Of course, as he held the shackle and they dropped the blade on it again, it promptly fell over and mangled his hand! Talk about "switched off"!!
He later admitted he'd been working too hard and too long, and simply stopped thinking. But the other guys with him must have been the same!
He was lucky, a great surgeon repaired his hand and gave him 2 workable fingers and a sort of thumb again, so he could grip things. He went on to live to 99!