The 48 year old is currently promoting the fantasy-adventure film, which centres on his immortal character Kaulder as he attempts to save New York City from a supernatural plague.

And, during the picture’s red carpet premiere held in London’s Leicester Square, Diesel feared burning himself to a crisp with the blazing weapon he carried.

"They strap on a propane tank to my back and hand me what will be the flaming sword and then they light the sword on fire,” he told reporters. "I look over to my left and I see eight firemen with fire extinguishers and I quickly realise, 'We're not in choreography school anymore!' This is the real thing and God forbid if I'm off just a couple of inches... Poof."