2) Another common usage of this is when you eat at a shitty vegan joint (Ex: Sprouts in South Lake Tahoe) and have to use the bathroom immediately afterwards. You drop a Kenny Loggins and leave the bathroom, only to discover you didn't really finish and have to run back in. Don't act like you don't know.
2) Dave ate a sub-par steamed egg burrito and had to uh! double-up, uh! uh! in the bathroom at the gas station down the street.