- Same as the blues?
- No, - she said slowly. - No, the blues are because you're getting fat or maybe it's raining too long. You're sad, that's all. But the mean reds are horrible. You're afraid and you sweat like hell, but you don't know what are you're afraid of. Except something bad is going to happen, only you don't know what it is. You've had this feeling?
- Quite often. Some people call it angst.
(Truman Capote "Breakfast at Tiffany's")