Thank you unforgiven91 for making this gif.
Stashed in: gifs, Reaction GIFs!, How I Met Your Mother, NPH, @kenjeong, Supernatural, High Quality gifs, Thumbs up!, unforgiven91
Not from unforgiven91 but I'm adding NPH high five gifs to this page, too.
A few more: http://pandawhale.com/post/8089/i-request-the-highest-of-fives-cool-story-bro
Album of high quality gifs unforgiven91 made: http://imgur.com/a/Mw4QL
The Supernatural scream above is from unforgiven91, too.