Mo actually took a moment to scoff at Kendall. Did he know how to drive a train? No, he was a 15-year-old Wizard without a train license to speak of. He might try to get experience with a Muggle car at some point, but a train was not in his skill set. And did he see a brake? Again no. Double no.

"I think we're meant to stop it magically," he finally offered. She knew that, he was sure. It was stress, and she was already talking about spells to use. He wracked his brain too, trying to decide what exactly was the best way to stop a train speeding toward a cliff. What did he know about the Hogwarts Express? "The train runs on both magic and mechanics, so I think we might need to try to stop both. The mechanics part is easier, I think, 'cause we know the train runs on steam produced from a fire of burning coals. The freezing spell could work on that. But to stop the magic... d'you think a Finite Incantatem would work?"

He wasn't sure the Leg-Locking Curse was the way to go, although he could be wrong. Kendall was the Charms guru, after all. He left her to work that part out, but since they both agreed that cold was key here, Mo climbed up on the sill of the window and pointed at the engine. There was water in there, and he really REALLY hoped this wouldn't make the thing explode. "Glacius."