That little imagine spot made me day. Mei having some life in her certainly helps too. Which begs the question of why they shouldn't they troll the class?
Oh people dying and all. :S Slow pacing, but highly enjoyable as I watch these two not existing, but actually existing.
As for the teacher at the end, he's acting like someone that got trolled on an online forum. Well, paranoia fill indeed; someone's gonna bite the dust really soon.