Here's a bit of a tip if you ever decide to film any LIVE effect with a Molotov Cocktail. BE CAREFUL!
I know it sounds stupid to say so, and that you'd already take precautions (at least I hope you would). But even the best laid plans can go incredibly wrong. My friends and I had an idea to film something like this. We spent two days planning, down to the angle at which he would throw it. Unfortunately, he brought his arm back a little too
far, pouring the flaming gasoline down his back. Luckily he escaped injury, but we had a hell of a time explaining the melted polyester coat he'd worn that day
So even though I am stating the obvious, be prepared for anything.