Bad Lettuce Event 

An unfortunate happening or an unexpected disappointment that takes away from that which would have formed the base of your desired expectations. Derived from expecting to create a salad at a salad bar and finding that the lettuce is brown or wilted.

"Bill won a free vacation to Europe, but is ill and can't go"

"Man, that's some bad lettuce event"

Bad Lettuce Event by Blushift December 23, 2008