Twilight Sparkle was only having a normal day when Sunset Shimmer popped out of the mirror separating the human world from Equestria. She demanded that her and Twilight go to the snow park for 4 hours of fun. Along the way home, Twilight falls off her scooter which she used to get to the snow park in the first place. Sunset carries her home and so waits there until Twilight wakes up.
(THIS IS NOT A TWILIGHTXSUNSET SHIPPING OK? JUST NORMAL HELP.)
(AND ALSO, CHECK OUT THE YOUTUBE VERSION OF THIS STORY.)