Oh bloody hell... the entire series makes me LOL. You seriously want me to choose one single image to display? Hmm... let's see if I can find one that will satisfy the request.
*finds a picture* Ah ha! I found one. Basically features all of the key moments that I LOL at usually.
![User Image](https://24.media.tumblr.com/tumblr_lhk76hgPMy1qablyvo1_500.jpg)