"I mean trap. It's not very hard to understand, now is it? Ever play Mouse Trap as a child? All the little.. plastic bits and moving parts that would never quite fit together just right?" He was making dramatic motions with his hands as he said this, face contorting a bit in mock concentration as he pretended to put the invisible Mouse Trap game together. "And finally you get it all together," he put on a surprised, pleased expression, "And you get your mouse nearly to the end of the game and oooh! You get sent back into the mousetrap!" He clapped his hands together, turning them into a cage-like ball, fingertips all pressed together to form a sphere. "And there you are, trapped in the little plastic cage all alone, knowing you won't get to the finish line before the next bloke does."
He dropped his hands at his sides then, eyebrows lifting and looking over at her. "That's what I mean by trap. We're the mouse trapped in the little plastic cage. Except our cage isn't plastic, it's this town. I can feel the planet turning and it's not Earth. I can sense the air shifting and it's bouncing off of something. You're trapped. And my TARDIS is gone and that means I'm trapped here too. So, there it is. We're trapped. Have any more questions?" Pardon him, Phoebe, he just couldn't help himself.