Authorities told CLTV a couple in their 40s had been drinking and were sitting in the front living room of the house when they allegedly decided to light a commercial firework they had obtained and possessed illegally. The couple then allegedly could not figure out how to extinguish the fuse, CLTV reported. The device exploded, damaging the house and setting it on fire. Neighbors heard the blast, called 911 and rushed to the scene. … Carmen Morales, spokesman for Nicor, said the house did not have natural gas service at the time of the explosion. Eichelberger said the dwelling’s electrical…