From our efforts - tripod, F8, bulb mode and a remote shutter release. Vary your time - get some with single bursts some with multiple bursts. Don't get too close or the smoke will get you. Try and include a point of reference eg a lights/building/crowd but remember if it involves lights, meter for that so you don't overexpose. Oh and have fun. Try playing a bit eg zooming your lens slowly in or out. And maybe a quick google search as there are other weird and wacky things to be done...
