Twilight:“Why do ponies always try to take on Ursas like this?”  
Tempest:“MY FRIENDS WERE IN DANGER!! YOU’RE SUPPOSED TO UNDERSTAND THIS!!! HOW DID YOU BECOME ‘PRINCESS OF FRIENDSHIP???”  
Twilight:”…This centaur named Tirek blew up my library. I nuked his flank, unlocked the Tree of Harmony’s lockbox, and got a new castle. Oh, and Celestia named me that. You know, the Alicorn you TURNED TO STONE!!!”  
Tempest: “…I really, REALLY!!! HATE!!! YOU!!!!”

@Deon Miller  
Facepalm…… or ………….. SARCASM.

Considering the fact that only her horn got broken when she was attacked by something that had claws as large as she was, I’d say she was lucky. But having said that, when something terrible happens, it’s easier to remember what you’ve lost than what you’ve kept.

Tempest: “It destroyed my horn with it’s bear hands!”  
Twilight: “…did you just make a pun?”

So this movie IS canon to the show……I wonder what gave that away?