Saw a clip there once of a huge traffic accident involving a truck just smashing through an intersection. There were 2 cyclists there, and only one of them noticed the catastrophe occurring behind them. The other just kept going his merry way. The truck just annihilatesthe cars and plows towards them, hitting light posts along the way. The one cyclist notices this and tries to outrun the truck. The other is just keeping on.

It's at this point that the truck starts smashing down streetlights. The escaping cyclist is far ahead just enough to have the lamp section come down like a butcher's knife and obliterate him.

The other cyclist didn't do anything and managed to survive unscathed.

Among all those mangled body parts, there's a lesson to be learned.