That's the reason I stopped building Pepsi can stoves. I was building them on my range top instead of the sink. The range has a hood and fan over it that vents to the outside. One of my stoves had a oopsie and the top half shot skyward and ricocheted off the hood.

If you're going to continue to play with fire, get a nice big driveway oil drip pan and do your experiments outside on that.

On a tangent note, Dry powder fire extinguishers leak pressure after they have been used. Make sure you replace the one you used before you need it again.