Do it outdoors, please, do it outdoors. I have a friend who decided to to a butane run, inside of his house. His lower level filled up with the invisable gas, a spark, BOOM!! He got 3rd deg. burns over 30% of his body. He was caught in the middle of a flashfire.

So always burn it away outdoors. NO open flames around it what-so-ever. It is highly flammable. Good luck and be careful.