This is going to be a silly question.....

2013-01-30T20:54:41.000Z

2013-01-30T20:54:49.000Z

What the heck is a pile up?

2013-01-30T21:01:37.000Z

Ah!! Thanks!

2013-01-30T21:02:12.000Z

I always wondered wtf it was! Strange to call it a "pile up" though.

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2013-01-30T21:14:21.000Z

Cool! Thanks!

2013-01-30T21:25:16.000Z

Yeah it's a weird name for it.