I feel your pain. I pick mine up with one hand all the time. this time it slipped out of my grip on the way out of my bag at ground level. it probably fell about a foot on its corner onto an epoxy coated cement floor. stupid? maybe. is the extent of the damage surprising? a little... considering when it landed it was like a tent, balanced on the edge of the screen and the bottom edge of the top case. is there a scratch anywhere else on the machine? no. is the screen still pristine? yes. so the glass screen withstood the shock... but the "machined aluminum" case did not.
either way... in the quest to get it replaced I call my local Apple Store. I ask for a cost (not to order... just a cost) on the replacement top case for my machine. Apparently to find out the price of a part, you need to make an appointment at the genius bar and go into the store. so... thanks for nothing apple store. I call my local reseller and after a 5 minute phone call, I have a new top case on the way for $280.00 CAD. "Do you want us to install that for you?" "No thanks I'll do it myself" "But sir just so you're aware your unit is still under warranty and this will void it" "It's ok, I'll take the risk" "Ok. No problem!"
3 days from now I will have it fixed. I'll post a time lapse later.
Apple: 0
Private Reseller: 1