Via Razor Apple, there's a great video of graffiti artist REVS getting ready to install a 400-pound sculpture. Though REVS's face is blurred out, we can tell he's tall, bald and badass - exactly what we imagined! And the NY Times' description of him from a 2005 article seems spot-on: "blackened fingernails of an ironworker, along with the vaguely feral intensity of someone on the lam."
Here are photographs of REVS' work on Streetsy.com. And here's his Wikipedia entry.