Place it just after a tense build-up and before the payoff shot, then follow it with a shocked reaction sound for contrast. A danger alarm works well beforehand to signal trouble, while a panicked plea afterwards sells the chaos that follows the flames.
About this sound
This two-second clip is Hat Kid from A Hat in Time chanting 'burn, burn, buuuuuuurn' in a high, gleeful voice that stretches the last word into a playful sing-song. It feels mischievous and gleefully destructive, like a small hero cheering on a little chaos. The line comes from the game A Hat in Time, where Hat Kid delivers it with bright, childlike enthusiasm.