3 true stories over 35 yrs:
...I once (that's all it took) in the 70's learned why a correct machine shop floor plan has their line of lathes with each set at about a 30 degree angle with only wall in line with the spindles and why yoose' shouldn't stand in direct line with a spinning chuck! (with or without a part in it)... luckily just cut up lips, a bkn nose, and of course 2 black eyes....
... are any any of you guys (and gals) familiar with rolls of 2" wide abrasive (sandpaper, various grits)?...anyway, we had a H.S. METAL SHOP TEACHER! hired on temp. for the summer...his 1st week in June he tore off a long length, wrapped it around a big OD and long work piece in our big American Pacemaker (to "sand" and "even out" the diameter to print), he wrapped the paper around his wrists while griping (top and bottom ends) of it while manipulating it back and forth along the spinning part while pulling hard....anyway, I got all this from seeing the accident report (I didn't see the carnage but I heard "it")...I later heard he got out of the hospital weeks later and he didn't loose his hands or arm(s)...
...the worst (a death) in one of "our" production depts. on a swing shift: It is said (guessed) the operator, with door open, had his upper torso inside a CNC (MS) lathe, with the safety micro switch switch taped while doing some hand radius work ("polishing", sanding...with paper again)...no one knows if he reached around to the control and hit the cycle start button by mistake or what but a 3/4" (mighta' been a 5/8") boring bar went through his head as the cycle started and finished leaving his tore up body hanging on the tool change magazine...2 of my friends (a set up man and a programmer in that dept.) and a couple of others released the tool (boring bar) and carried him down to the main 1st aid room to wait for the ambulance (all in that dept. were offered counseling if they chose)
Sorry for the bummer but I tell these on every machining site I venture in to (Be careful (smart) out there)