A lot of ponies were separated from those whom they appreciated and loved by a big rupture. Scootaloo, Cheerilee and Falcon Lover were ones of them. The worry for the fate of their loved ones and closest friends didn't give them any peace: "What if they really died in an earthquake in this bottomless abyss?" This is what pushes the pony teacher, students-tomboys to desperate measures.
Inspired by "Rupture" by Waterflame