Nahhh....it's fine, I get why people would think I'm a psycho. But I think death interests everyone.
It's typically more horrific things than this. Car accidents (pedestrians), drownings, industrial machinery, gang violence, etc. I found some good Reddit subs; the stuff I try to avoid is the excessive gore/violence because it makes my stomach turn (yeah I know, a very refined death video aficionado.)
But the kneejerk reaction from Stafford is pretty consistent from what you see from bystanders on there whenever something happens involving someone nearby being harmed. In that one second of processing what's happening, it's totally normal for someone to look away like that, back away, turn around, etc. That doesn't mean they're not going to come back to help or that they're not concerned. It's just a normal reaction. This isn't like the movies where someone slips and hangs off a ledge and another arm comes sweeping down to pull them. Rather, you have people just going through the normal routine of their lives, totally immersed in their own reality, and oblivious to the fact that in seconds, some totally unexpected thing is going to happen. It simply takes a little time for most people's brains to process what's happened and switch to a state of concern.