Hey, I'm the Nik credited in the text at the end of the post, I'm just here to give credit where credit is due:
Borris the Badass Horse:
Created by: Noiplah (http://www.reddit.com/user/noiplah) as seen in this thread: http://www.reddit.com/r/gaming/comments/mb6bh/the...

The "Physics? Bitch I'm a horse" picture:
Created by : Emperorr (http://www.reddit.com/user/Emperorr) as seen in this thread (http://www.reddit.com/r/gaming/comments/ma565/bethesda_we_need_to_talk_about_your_horse_physics/)

As much as I love the click-throughs, I can't take credit for either of these images!