I have always said that if you are out in the bush, lost, injured, cold, going to die. Light the forest on fire. Make sure you are upwind of course but you will have all the help you can handle in a couple of hours
![Wink ;) ;)](https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f609.png)
I am a registered trapper and have lived out in the woods for a large part of my life. One year, I slept inside, at home a grand total of 7 nights.
A laser could be an invaluable tool for extreme wilderness survival.
A >1W laser can get you food (emergency killing only please), start fires even if you have been dunked in the drink, signal for help or coordinating hunts, etc.
I usually carry 3 knives, a zippo, 3 bics, a "permanent match", a pocket full of jerky, and a package with suture needle and mono fishing line.
You can sew yourself back together if you get badly hurt or bend the suture needle into a hook and fish with it.
The laser is a good idea in theory but I wouldn't trust my life to it.
Learning basic bushcraft/firecraft is a much better way to potentially save your life.