It's not Jello

According to Jon Murray of the Denver Post, there have been dozens of home explosions in Colorado this year because people have been attempting to extract hash oil from marijuana:

A new proposal backed by Mayor Michael Hancock's administration would ban the home use of solvent-based hash oil extraction. It involves highly flammable compressed gasses, typically butane, in the extraction of oil from marijuana. An additional risk is that some users stock up on those gases in their homes.

Home-based extractors seek to produce hash oil that has a consistency similar to jelly and can contain more than 75 percent THC, marijuana's psychoactive chemical.

It's much more potent than a joint.

Using the gas method, extractors typically stuff marijuana into a slender pipe and then blow compressed butane gas through it. This releases flammable butane fumes into the room that can ignite at any spark.

Read more here.

In a related story:

PARKER — Aurora and South Metro fire investigators blew the walls, windows and door off a small structure Wednesday during a demonstration of a home explosion caused by the illegal production of hash oil while smoking.

The 8-by-8 plywood structure was set up outside the South Metro Fire Authority Training Center at 17801 Plaza Drive. Firefighters filled the sealed room with four cans of butane gas and left a slow burning fuse inside to simulate someone smoking marijuana while manufacturing hash oil.