. . . he had drunk two glasses of Pimms and six glasses of wine he should not have fired the flare . . .
. . . what happened was a "freak accident" and the flare had probably veered off course due to a manufacturing fault.
That's all right then, as long as the flare is fault free, fire away.
Probably delay his majority for 6 months or so, good chap Wuppet.