Warming up tires on the street?

[the chi]

I zig zag a bit, not so much to warm the tires, but like Tig said, to knock or scrub off any hanging on debris...out here in FL, theres alot of sand, even in the non beachy areas, and some of the back roads have dirt and mud driveways, riding in formation on the edge closest to that, you pick up some crap...and its a mental thing for me too I guess...if I do it comfortably and loosely, I know Im ready to have a little fun, if Im all jerky and rough, that tells me my head isnt in the game and I need to warm myself up a bit.