He stared at Dipper for a moment, but there was no recognition in his eyes, no understanding. He might as well have been staring through him.

Because there was something louder than Dipper in the back of his mind, something telling him to kill rend slaughter tear him apart -

There was a crash from outside, and the ship shook from an impact. Sam looked up with a jolt, and then, in a streak of red, took off for the hole they'd come in through.