I would end up turning into a ... something snake-like and devillish... but not a snake or a dragon or a tasmanian devil.
Probably a cat.
First of all, I WOULDN'T be in a cage. I would be outside in that little public park where I like to go sometimes.
I would run REALLY REALLY REALLY fast to my house. Probably knock into a few walls because I would fail at seeing black-white. .3.
I would frantically scratch my way into my door, even if my claws go blunt and my paws get bloody. Atfer breaking in, I would freak out and scratch EVERYTHING.
Then I would fail at trying to put my Ipod Touch earphones in my ear, turning it to The Bottom-Staind, and listening with a trollface.
I WOULD GO ASDFGHJKL and probably attack people... maybe scratch somebody I don't know face off. :P
And then I would suicide, hoping that it would change me back. Maybe jump off a bridge or stand in the middle of the road... or mess with a very large dog...