A flying suit isn't going to protect you from the effects of the towering inferno! Unless the fire simulator can do a flash fire all you are going to end up with is crispy black flying suit remains and a lot of worried onlookers.
Better make sure it's a new flying suit too and not one that's done 1000+ hrs as the fire resistance drops off after you wash it. I believe there's some special detergent stuff you are supposed to wash it in but I've never seen any, bit like the special silicone boot polish you are supposed to use.