Plasma flak seems to fit your needs.
So yes aliens?
Yes aliens.
I slowly come to and I see someone trying to talk to me. I groan, "Ugh... hurts... so... much..."
He was working on my wounds, and he gave me a shot. Oh, how much I hate shots...
The pain started to go away, and I fell unconscious again. I woke up, apparently a few hours later, in an odd, metallic room, on a bed. I try to move my left arm. I don't feel anything.
Must be the painkiller, I thought as I fell unconscious again.
I was planning on doing some sort of missing limb thing, but I didn't like the idea, so I ended up with my whole body covered in burns and bandages, and the upper left leg and lower right arm are shattered, and I'm in a neck collar.