Constable Matthew Crawford of Nelson police with the butane gas canisters commonly used by cannabis oil producers.
Blair Van Haaften had been using butane gas to cook cannabis oil in his grandparents’ caravan when he felt the need for nicotine.
So he lit up a cigarette and the caravan exploded.
Van Haaften escaped and ran into his parents’ house and into the shower where he ran cold water over his extensive burns.
Van Haaften appeared in the Nelson District Court on Monday for sentencing on a charge of attempting to manufacture cannabis oil.
* Cannabis oil production risking lives
* Man seriously injured in Richmond caravan fire
* Burns punishment enough for cannabis oil cook
* Two injured