"Reality is a bubble. Made up of particles, when those particles rub together the friction creates energy." Derpy stared at The Doctor as he explained it. "They're really big particles." Derpy nodded to show she understood and The Doctor went back to explaining. "The energy makes every universe different. It makes the time different, it makes everything different. Understand?" Derpy just stood there with a confused look on her face. "Reality is a big bubble of wibbly wobbly timey wimey stuff." Derpy nodded again. The TARDIS whirred as it flew through the time vortex. "So where next?" The Doctor asked.
"Barcelona." She said.
"Which Barcelona? The planet or the City?"
"There's a planet?"
"Yep."
"The planet!" The Doctor smiled and pulled down the lever. The TARDIS began its trip through time and space.
"They've got dogs with no noses!" The Doctor exclaimed. Derpy laughed. She never knew travelling with The Doctor would be so much fun! At that moment the TARDIS seemed to stop in mid-flight. It just came to a complete hault. Suddenly it began to travel backwards. The Doctor tried to get it to full speed but it didn't work. It kept being pulled back. "Brace for impact!" The Doctor yelled diving to the floor. At that moment there was a slam and the TARDIS crashed into the ground. The Doctor stood up coughing. "Not again!" He walked to the door and pushed it open. He was met with a familiar pony. He didn't recognise her until she said the two words.
"Hello, Sweetie."