I can believe that, mate. When I was working for Verbatim, back in the 90's I was working on one of the robots which certified 3.5 inch floppy disks. The drives formatted both sides at the same time at 4 times normal speed. With 18 drives in 6 stages, the robot was busy!
It gave a fault that the product (disk) from one of the drives did not make it to the outfeed conveyor. I opened the cover, and saw that the disk was hanging over the edge of the conveyor. Keep in mind that the cover had a safety switch on it that stopped, OR WAS SUPPOSED TO STOP, the robot from moving while the cover was open. Normally I would have used a long screw driver to move the disk onto the conveyor, but my roll around box was 3 machines away, and I got lazy.
I reached my left hand in and knocked the disk onto the conveyor. Immediately, the robot moved down across my left index finger tip like a guillotine, taking off about 3/8 of an inch. When I pulled out my hand the tip was hanging on by a bit of skin, and there was blood everywhere. This was in a class 1 clean room too!
Being an EMT at the time, I calmly wrapped it up and went to the ER and got it sewed back on. It took a while to get the feeling back to the finger tip, and it is narrower than my right index finger, but it works fine.
Again, lesson learned. There was an investigation, and even the manufacturer's engineering rep could not explain why it moved, but I never really trusted that robot after that (can you say Christine?). That was one of the small robots, had it been one of the big ones, it might have taken my hand.