"Often enough," Furfur replies with a grin, leading the way out of the tavern. "When I need to get someplace quickly, or if I'm new in town. Best way to get a feel for landmarks, and few places have nice, easy to navigate streets. Best of all, you can run as fast as you like without havin' to worry about runnin' into people."

With a shrug, he gestures to a building and asks, "How good are you at judgin' distances? The real key to runnin' across rooftops is knowing at a glance if you can make the jump to the next building, and if you can't, figuring out what climbing sources are available that you can aim for instead."