"HOW ARE WE ROLLING?!"
"I DON'T KNOW. ASK PINKIE!"
"PINKIE, HOW ARE WE MOVING WHEN ALL OUR HOOVES ARE FUSED TOGETHER IN THE CENTER OF THIS PONYBALL?!"
"I DON'T KNOW, ASK PINKIE!"
"YOU ARE PINKIE!"
"OH YEAH! I THINK WE'RE MOVING AROUND BECAUSE SOMEWHERE AT THE VERY CENTER WE'RE BEING USED AS A GIANT HAMSTER BALL OR SOMETHING."
~~~Meanwhile, at the very center of the ball of Earth Ponies...~~~
Angel bunny cackled manically, his ultra-gruff, demonic voice screaming for more blood as he ran over yet another pony with his weaponized pony ball.