> Has woken up in the middle of the night to a billing alert email?

I went through an awful period of on-call at my last place, and seeing "Amazon" come through on the work email shocked me awake thinking it's another CloudWatch alert, only to blearily see it was the regular end-of-month statement.

You get the same feeling when you wake up before your alarm and you think you overslept, but now you can't get back to sleep for the adrenaline in the blood.