You'd have to mix the hydrogen with oxygen to get it to do much, but if you do it looks like this:
http://video.google.com/videoplay?docid=8720099608149373779&ei =sdw5SNr5FJKc4gLIr63hAw&hl=en
These videos are literally as old as the modern internet, back before mp3 audio compression. I remember seeing them when I was 12 (I'm in my mid 20s now).