Better than pepper spray
Walking down a dark alley at night can be dangerous without any protection. Of course, you can always carry around a can of pepper spray. While it might not stop a person from beating you up, it’ll at least slow them down. But if you can’t find pepper spray in your town, just do what this guy did.
Get a BBQ grill lighter, tape it to a can of butane gas, and you’re ready! Now, you have a makeshift flamethrower that’ll do more than deter bad guys from mugging you blind. If it runs out of gas, you’ll have a pretty decent projectile.