I went and looked this up, turns out drinking acetone isn’t as outright dangerous as I expected. Our bodies produce a little of the stuff when breaking down fat, into ketones. It’s only a problem when there’s too much of the stuff for the liver to process.
Gotta say, it was delightful to see the range on Matt Smith. He can go all cheeky and charismatic as the The Doctor, then to being creepy as hell on HOTD. He’s freaking great!