Bill led, we followed. Mechanical muscles and computer reflexes ensured no oopsies, and in seconds we were lying flat on top of a roof. There was a short barrier wall around the edges, more likely for aesthetics, as I couldn’t see it being of any practical benefit. I opened my mouth, spit out a roamer, and set it on top of the wall. The others did the same, and in moments we had four video windows hanging in our heads-up displays while we lay out of sight.