In the brief illumination she could see the floor of the compartment steeply tilted up and at its further end what looked like a huge, black cavity.

The whole side of the carriage had been wrenched away.
"Come on!" exclaimed the man, catching her by the hand and pulling her forward towards that yawning space.

"We must jump for it.

It'll be a big drop.

I'll catch you." At the edge of the gulf he paused.