Should I keep letting this situation weigh me down?

The other day I was waiting for the bus and some guy started yelling at me and threatening me and even threw his drink at me for no reason. It was the first thing something like this has happened and it was in a relatively safe area so it was shocking to say the least.

I know I should just see it for what it is: a mentally unstable man projecting what’s going on in his head, but I felt genuinely scared for my life at the time. I’m naturally sensitive so I get weighed down by things really easily. It’s been 2 days, and I still feel shaken up. I just keep thinking about what I could’ve done differently or how much worse it could’ve been.