Traffic jam

One dumbass in a minivan or a Prius

It was the bird who shit in the bike riders eye who turned into oncoming traffic that did the same causing a massive pile up that led to widespread roadrage that turned into a city wide riot of looting and burning bringing in the national guard which brought in the news camera's spreading it nationwide which sparks riots nationwide which leads to nationwide anarchy all because a bird shit in a guys eye. Or its that one women who thought the gas pedal was the brake.

That's MISTER dumbass to you!

Nope, it's generally just red traffic lights backing up traffic in a sort of exponential manner.

Yes

https://www.youtube.com/watch?v=iHzzSao6ypE