I stumbled upon this story just now - Under the Knife and Feeling It All - and while it is rare, it isn't as rare as having a baby die during a uterine rupture during a VBAC!
1 in 1000 general anesthesia cases are aware of some or all of their surgeries. It isn't always pain, but awareness has to be horrifying all on its own! Listening to the party atmosphere often found in operating rooms would be horrid if I were under anesthesia for cancer or some other equally serious reason. ("Is anyone paying attention to me? Does anyone even see I am awake?")
100 of those 1000 feel every part of the surgery, from incisions to removal of body parts to sewing the body back together, layer by layer.
I cannot even imagine.