You can see him thinking, "Fuuuuuuuuuuuuuuu!!!!"

Imgur comments: http://imgur.com/gallery/BAu36AF

Reddit comments: 

http://reddit.com/r/gameofthrones/comments/274nt5/s4e8_my_face_at_the_end_of_the_episode/

More gifs and memes from The Mountain and The Viper -- episode 4.08:

http://pandawhale.com/post/44839/game-of-thrones-season-4-episode-8-the-mountain-and-the-viper-gifs-and-memes

This is an amazing gif:

Thank you bzztwhirrclick for making this gif:

http://reddit.com/r/HighQualityGifs/comments/27717k/game_of_thrones_s04e08_o/

More gifs from The Mountain and The Viper:

http://pandawhale.com/post/44934/the-mountain-and-the-viper-high-quality-gifs-game-of-thrones-s4e8

Here's a really good analysis of the Beetles scene compared with the Trial by Combat scene:

http://pandawhale.com/post/44948/the-mountain-and-the-viper-analysis-the-beetles-scene-and-the-fight-scene-line-up-almost-perfectly

Mind blown!