A> Or, even better, use a mixture of liquid oxygen and propane. =====Obviously, you haven't handled LOX yet, or you would not have given potentially fatal design conditions.
Perhaps realize that it may be a joke? I think you'll find "human farts" on the list as well, yet obviously, no one would seriously suggest that methane sourced from the ass is a viable fuel.
And yes, I've handled liquid oxygen. The logistics of obtaining, transporting and storing it would be beyond the capabilities of the typical 12 year old reading that page.