Breathing through a bag

I've just managed to submit my hp_halloween offering this year. Yay! I actually contributed to a fest this year!

And  like the arsehole I am, I forgot to mention stgulik in my notes and thank her for the amazing help she gave me in this. I sent a second message to the mods asking them to add this to the author's notes, but if I screwed up and they can't, I want it mentioned here that Jules' beta work on this knocked it out of the park for me. And I'm sorry to be such a plonker.