Conan O'Brien's 'How I Met Your Mother' Cameo Surprises Viewers

The Huffington Post News Editors,

Twit­ter lit up Mon­day night when view­ers spot­ted a very familiar-looking red­head­ed giant in the back­ground of a new episode of “How I Met Your Mother.” Yes, it looks like Conan O’Brien made an uncred­it­ed back­ground appear­ance at MacLare…

Thought I saw him