[How about wondering into the kitchen and coming face to face with... a figure lying on the floor??
Stiles, annoyed by the lack of sleep (because you can be used to all-nighters and researching until you drop, but staying up because you're forced to stay up? U G H), thought it a great idea to do as Emma thought, to go and eat something... only he ended up eating an entire bag of candy in his annoyance, and now he's. not feeling that great, hashtag regrets.
Which means he's lying on his back on the floor and groaning.]