Exercise in keeping my mouth shut

[pt_tangles]

 ... but shouldn't you already know how to stop a spell before you start casting them for all and sundry??   Isn't that a little like asking where the brake pedal is after you're already barrelling towards a stop sign at 50 klicks?  Just because you didn't know ahead of time that it would be there doesn't mean that you never need to know where the damn breaks are!

*headdesk*