Trust me its a pain in the ass.

Now that i look back i know what it must have been. I l;eft my bike down here on main street (Lots of businesses and what not here) and some one must have pushed over my bike and picked it up again. So when i swapped to first gear while going fast (Knowing that i had to brake soon) the derailure went into the metal spokes of my wheel. Causing this catastrophic failure of the bicycle.... Awell