 When the sequence of Godzilla being fire bombed was being shot,  during one of the takes, the flaming liquid splashed up onto  Godzillas head. The fuel quickly burned away and the flames went  out. Inside the suit, performer Haruo Nakajima was unaware of the  accident since the head of the suit is well above Nakajimas own  head. Godzillas head aflame became an unplanned bonus to the  effects shot and it was included in the final cut.