In reply to steve edwards:
An example from your 'turf' might be instructive Please video it, I'd love to see how it works!
Get, and fill, a 'Yosemite Big Wall Drainpipe PortaPotty'. Drilla couple of airholes at one end (the one you'll be holding - make them about 1/2" diameter, you need to see what's happening in there).
use your zippo to light one end: the gases will make a fine drying blast.