Anybody else sorta feel bad for that dragon? All old and faded, chained up in a dungeon... I guess the Wizarding World doesn't have an SPCA.

Good Sporkage, Harry and all the Imperio-ing drove me nuts. I think there were probably some other options he could have tried first. Also, being as it is an Unforgivable and difficult to perform, he might have had to try a few times to get it right? This is the same boy who took for-flippin-ever to get Accio!