Sarcasm is something that makes sense when said, but hard to grasp when written down. Hopefully the dramatic body movement conveys it.
Other than that, not much else to say that hasn't been said before. Shading, Backgrounds... hopefully now that shit will be regular enough to not need mentioning at all.
There is one major flaw though, which bites. See the bottom left hand corner, where Dr Cox's finger disappears off page? I shouldn't have allowed that, it would look so much better if the whole right hand was in frame (like Elliot's was in the previous comic).
Oh well, learning process.