This sensation is common when scavenging the upper floors. It is a form of high place phenomenon, typified by the healthy desire to jump off an edge. This urge comes from contradictory signals generated by the brain – the backing away from an edge, reinforcing the conclusion that you were always going to jump.
Out on the hotel rooftops this feeling is commonplace, one of the many urges we must learn to keep in check.
At the edge of the roof another stranger watches out over the city. Without any further consideration I follow my urge, walk up behind him, and push him off the edge of the building.