Sadly, we never know when we'll end up in a situation that makes us feel vulnerable. However, those situations can sometimes show us how noble and heroic some people can be in ways we didn't expect.
I experienced this at a rap show a few years ago when a couple of guys wanted to fight me because my buddy was annoying them. Yet, to my surprise, two total strangers stood by me and said they'd fight back if anything happened. Thankfully, nothing did.
Unfortunately, the dangerous situation that Reddit user strawberry_luv experienced seems more common. But hopefully, the response she received from a stranger can be common too.