I dunno guys. He is only about 1-2 seconds away from you. I really do not think there is enough reaction time to get in your car before he is all over you. My first thought is to put some distance between him and me. If he is bleeding that badly, he won't last long.
Might try a good shot of gasoline to see if it might stop his bleeding, if that fails well just help him cauterize the self inflected wound.
Bad idea I know, but the gas nozzle is a good defense at a gas station.
You need a hobby, you've got too much time on your hands..you all sound like a bunch of twelve year old girls at a pajama party.
Second, in my professional opinion, if he has cut one of his arteries then I see no need to shoot him. Just run away from him. If he comes running after you that will increase his heart rate which will in turn increase the rate at which he bleeds outs.
If he cut himself good and is doing nothing to attempt to control the bleeding then it shouldn't be too long before he starts getting light headed/woozy and is unable to continue chasing you and/or passes out.
Above all else, your only obligation is to yourself and your own personal safety.
If I saw this go down while I was off duty and the events unfolded as I have described I wouldn't touch him with a 10 foot pole. Good rule of thumb...."If its wet or sticky and isn't yours, don't touch it."
I would probably try and help him. If I am in my car or near it I know I have a full trauma kit. I would probably try and defuse the situation with some "can I help you" talk, put on gloves and go to work.
Im assuming no knife and he is compliant. If he isnt well, I dunno then. If hes bleeding that badly I should win the fight anyways and I think most EMTs, Emergency Responders have had to deal with combative patients. If it gets totally out of hand, well it happens. I would obviously have dialed 911 immediately.
Knife, no knife...bleeding, not bleeding...come running at this old guy in a gas station at night and ignore my warning to stop? Your loss...:yup:
I would likely only try to help AFTER LEO's are on scene and can control him.
I have enough trauma stuff in my car to deal with his bleeding, but I'm not getting involved with a suicidal/mental patient until the police are on the scene.
Also spraying the guy with gas might deter him, it might not. The gas stream sure wouldn't have enough force to drive him back or knock him down. I think retreating around the car or into the car if there is time is the best bet.
I probably wouldn't lose any sleep over it seeing as how he was suicidal anyways but its not something I would want to witness or know I was a part of.