This is what happens if you don't bother to wear your gloves whilst MIG welding, and a blob of molten steel lands on the edge of a gold wedding ring.
The ring
And this is what happens if you pinch your finger in a spring when reassembling a coil-over. The area of finger was crushed completely flat, and I had to tear a chunk out of my finger to get free.
This is what happens if you don't wear adequate protective cloting whilst laying on your back welding upside down. A jumper and t-shirt do not slow a blob of molten steel down very much.
Dropped the front axle on my fingers whilst placing it in my trailer. It then slid along, stripping the skin off my finger in the process.