Must have been something on the tracks but I don't see them. That was quite the tumble but we couldn't have been flung that far from, could we?

[And then he realizes McKay has fallen silent and that's not good.]

Rodney?

[John's face immediately turns serious and he hurriedly bridges the remaining distance, squatting down to check his head for injuries. There's only the cut on his forehead but that looks like a concussion if he's ever seen one. He squeezes his shoulder instead of shaking him, raising his voice.]

Rodney! Wake up. Come on, buddy, my back is killing me. Don't make me carry you.