Ha ha ha! NO! No F-in way I would have had the cojones to try that. The grip was precarious enough without having to worry about the small tips either slipping off or popping off a tiny bit of brick and me plummeting onto a hard surface.
Heck, the relatively soft bark of a redwood worked great, and I probably only fell 15 feet or so on my oh so shaky way down (but onto very soft loamy forest floor).
