OH MY GOODNESS.
-When you wait in a SUPER SLOW/LONG line for something that ends up taking less than two minutes.
-When you're listening to your headphones and the piano in your house is being played really loud.
-When grapefruit juice gets in your eye.
-When you're totally free to hang out, and then you remember, "oh yeah. I can't."
-When you can't find that one thing you just barely had. (that pen, that website, that chocolate kiss, that list of items, etc.)
-When you look forward to leftover chinese food all day long and then come home to find that your sister has finished it off.