Rutgers U Faraday Christmas Physics Lecture 12/13/2008
Things you can do with a Hydrogen filled balloon and a little fire
D3/Nikkor 17-35D f2.8
1/50s f/5.0 at 35.0mm iso6400
One of the guys on midnites used to do that with garbage bags and acetylene gas. He tried mixing some oxygen in, but the expplosion was just too strong. Plus, the bag didn't float as well. A poof at ceiling height (40 feet) was okay. A much stronger bang at 10 feet was not so cool.