Why do I feel bit restless or sort of faint when I see bad accident?!

Why do I feel bit restless or sort of faint when I see bad accident?

Sometimes, when I see a very bad accident I suddenly feel bit of faintness and unconsciousnes.. Is it that my blood pressure drops seeing a bad road accident ? If yes, then how can I improve on it ? What should I eat etc. so that I do not have this problem and I can face such circumstances.

6 days ago
Not that I see accidents very frequently. But like once I saw a very bad accident with body parts torn apart; suddenly I started feeling bit unconscious; my vision blurred; I wanted to just look away and sit there (i felt like I dont have energy to stand ) .. and yes fresh air.. Moment I went out of the place ; i felt normal..

I know it might be normal ; but I just felt that are these symptoms of low blood pressure that when seeing such incident my blood pressure drops.

sounds like anxiety to me