Do you want to know how I got this pony? My father was brony, and a foal. One night he comes home drunk, craaazier than usual! Mommy gets the birthday cake out to defend herself. He doesn't like that, not. One. Bit. So, he takes Pinkie Pie, laughing while he does it and puts Pinkie near the cake... And he turns around to me and says... "Why so serious?" Then comes at me with my slice of cake... And... Why so serious?
*gobbles Gambol's cake*
Awesome work! Just spoofed that speech off the top of my head from seeing The Dark Knight about... 20 times!