Pipes being Pipes is perfectly willing to go over a part of the city he's already explored. There's always some buildings he had to skip to get back before night and despite the fact nearly every one of them had the same amount of rubble, every now and then he'd find something interesting.

Which he did, being too busy fiddling with it to watch where he's going and walks directly into Ambulon. You'd think he'd have learned by now, but, well. Obviously not.