Dayam. Just, holy hell. You hit it all, and so gloriously! I mean, how you go from Fred and George, seamlessly into what Harry and Sirius are doing and back... the promise in George's words and the effect on Fred, and Snape!
OMG Snape is Snape! He's all... Snapey! *whoot*! He's perfect! Thank you! *runs off to rec*
And I realise I used wayyyyy too many exclamation points there, which really should tell you something. Eeek.