Or when you've been looking forward to those leftovers in the fridge, pretty much all day after a long one, and you open it up to find out that someone ate it.
Ugh. Or when you had tickets to see Del tha Funkee Homosapien - were excited for months to go see the small venue show - and the day of as you were waiting outside the venue, they announce that the concert was canceled because of the "snow" - and there will be a refund of your ticket but no future re-scheduling of the show. I still haven't gotten over that feeling.