Snakes are terrifying. I said it, I mean it, I don't take it back. But sometimes you can look at one and think "Y'know what? They aren't that bad. This one is actually kind of cute!"
And then this happens and our fears are reinforced.
Take a look at this incredible footage of a slow-motion viper attack. To be fair, it's pretty cool looking. It helps that we aren't in any immediate danger, though. Also if this slow motion, I'd hate to be there when it's full speed.