Red (Dr Horrible/How I Met Your Mother crossover) PG

[idioticonion]

Title: Red
Summary:  AU - Robin stumbles on something amongst Barney's fancy dress costumes.
Rating/Warnings: PG / Crack-ish
Written for: A fanfic100  challenge for prompt #011 Red
Word Count: 749
Fandom/Pairing: HIMYM: Barney/Robin
Spoilers: HIMYM, The Possimpible, Dr Horrible's Sing-Along Blog

( Red can be found under the cut... )