According to an article in OregonLive, Joseph Westom died as a result of receiving burns over 90% of his body after an explosion occurred in a garage where Westom and a friend were extracting THC from marijuana using butane. Butane, the same flammable gas used in lighters, is commonly used to extract THC from marijuana.

Westom died 18 days after receiving the burns and his friend spent six weeks in a coma and went through multiple surgeries to graft skin to replace skin burnt in the explosion.