Never been stabbed have been cut, in various MA demos....
Served as an infantry medic in the US Army during the cold war, 70s.
treated lots of wounds, a few inflicted by others, most by self with objects that happened to be near by.
For example in Korea, a ROK soldier, thinking it was a good idea to try to cut off the top half of a Soju (소주) bottle with his hand.
Slicing it down to the bone in the process...required subcutaneous sutures. "Sutures below the skin" before closing with sutures above the skin... He couldn't speak much English very drunk,,,kept saying " I f__k up, I f__k up".

yep,,,looked like he did....late at night trying to impress a lady friend at the time...isn't that always the case
In the German Democratic republic "GDR" during the cold war, a GI decided it would be a good idea to punch out a window...the window won
Sliced his tricep down to the bone as he managed to slip a little bit...before retracting his arm...
The body can be surprisingly resilient, unless one manages to either hit or cut an artery...
Venous blood dark red...takes a while to bleed out..
Arterial blood bright red, bled out may take as little as 3 min....