"Because it's a train, and it's moving very fast, and you don't have time," Atton said, rolling his eyes. "This isn't a 'look for a loophole' kind of situation. You can't reach anyone in time because it's too fast, you can't stop it because it's a damn train, and if you run away to go get the guy who put them there, his buddy will show up with a knife and everybody's dead."

No, that last part wasn't actually part of the dilemma, but Atton could be spiteful.