This is a great YouTube video that's super short and packed with info. Have you guys tried any of these tips? I knew the one about using a mirror to reflect light, but creating flames with aerosol and a lighter is new to me. I'm not sure that I'd be brave enough to try it.
I think you'd be fine, so long as you have a fire extinguisher on hand, Fairytale Studios. I've tried the technique of shooting through a glass ball and it does create some interesting effects and distortions.