Hearing a couple of raiders discuss a previous captive. He had rocks that he pretended were grenades, even going as far as making the explosion noises himself. Then he escaped to his motorbike outside, which did not start first time.
The motorbike did not exist.
This is why I love these games. They are full of lovely little touches that you may never find (did you know there was a room in Fallout 3 that was set up like a domino falling thing?)
As for the raiders, I shot one and Dogmeat got the other.
Well it is a game!!