That feeling when it's 5:35 a.m. and...

...you're already through one cup of coffee and into the next and work texts you and says, "Go back to sleep; I've put you on call" and now you're in that hellish in-between world where you're both drowsy and jittery like your body is just not willing to commit to one or the other so all you can really do is slump into a chair and fidget and yawn all morning and whine about all the things you should be doing.