Personally, I'm not too fond of the name either... sounds really corny. If you want something original, or at least of the same status as Fireman, think of something like... maybe, FireBreather? Still, clearly not the best name, I probably wouldn't choose it, but it is original, same concept as Fireman, and not nearly as cheesy. And it gives you the feeling that you are being launched, as the fire would be from a fire-breather, or perhaps even a dragon.
I could see a ride with that name having a cool Hawaiian or even medieval theme, whilst Fireman... all I can picture is a ride surrounded by firetrucks. :p