captain siegfried cline with the aurora fire department organized this demonstration to show how butane can ignite when amateurs use it to extract hash oil from marijuana plants. a new and dangerous effort to produce a more concentrated form of pot at home. >> and that's the attraction. the purity. it's got a more potent high from it. >> very potent high. >> reporter: windows blown out, kitchens ripped apart. in 2013, colorado saw just 12 of these explosions. but last year that number jumped to 32. dozens of people have been hospitalized. amazingly, no one has died. >> that goes up in a split second. >> very fast. very quick. it's not going to allow people to get out of the area in time. >> reporter: here at the state capital no one would argue that the type of hash oil extraction isn't dangerous, but given that colorado voters have legalized marijuana, the question is, is it a crime. >> i think some districts believe we can already prosecute people for trying to create hash oil at home. and there's other districts who don't think so. so i think it's an area for clarification. >> report