There are so many things Twilight could have pursued an answer for. What actually made the region dependent on ponies when the other countries run wild? What is the origin story of the changelings? Can other pony races learn to cast spells?

Instead, she turned to a volatile subject. Once more, she targeted Pinkie Pie. Her changeling test-subject is all to happy to help her answer that question, as well as one of his own.

"How many times can you prank an alicorn before you end up on the moon?"