During Episode 29 of FMA:Brotherhood, Roy Came out to find Armstrong waiting for him at his car when he expected Hawkeye to be there.  Hawkeye soon appeared saying that she had just returned from her "latrine break".  Just how desperate was Hawkeye that she would leave someone else in her place to wait for Mustang?

(Long story short: A desp fic about Hawkeye waiting for Mustang and eventually being forced to run off to the bathroom.)