Tractor PTO safety demonstration and accident - video and GIF

[Frank S]

I wouldn't ever want to grab hold of it but my brush hog shredder has a plastic sleeve over the PTO shaft that is secured to keep it from spinning it also covers the u joints but I'm not going near it while the shredder is turning. The same shaft & sleeve fits other attachments but no one is going near it while spinning.
I just noticed the safety sleeve is on the PTO shaft in the first video but it is not properly extended or secured it is were then the u joint would be covered by the large bell.

The poor guy in the second video probably didn't survive judging by the way his head was digging a hole in the ground as he was flung around.