Rainbow was exhausted. She'd been flying around and banging on the walls and ceiling for hours, and the best she could do now was tap her hoof against the ice.
She lied down on the ice floor.
She was temporarily blinded by the ceiling opening, and she painfully rose to her hooves.
She looked up and saw two guards. She assumed they were Sombra's, since they were dressed head-to-hoof in dark clothes.
"Rainbow Dash, it's time."
Soarin!
"Time for what?", she asked.
They didn't respond. Instead, they flew over to her, and tried to grab her. But she flew out of the way as fast as her injured wings could carry her.
The guards chased after her, but she was too fast. She dodged them for as long as she could. She flew up, up, up, until she was thousands of feet above the ground. The guards were wearing out, which is exactly what she wanted. She dropped, which made the guards clunk heads, but they recovered. They, too, dropped, following Rainbow.
Rainbow stretched her hooves out in front of her, each second moving faster and faster to the ground.
She released all of her energy from her sides, and it formed a rainbow circle of the energy.
A sonic rainboom.
The guards were chucked against the walls of the ice room, and, amazingly, they broke right through it.
Rainbow chose one of the holes and escaped.