The molecule is itty-bitty, and tends to leak through "solid" materials such as steel and aluminum like water through cheesecloth.   Brown's Gas is viciously nasty stuff.  Very energetic, burns very fast, and burns very hot!   Don't even imagine playing with it unless you want your only remaining body hair to be on your nether regions!  

One of the first applications of Oxyhydrogen (the real name for Brown's gas) was lighting by heating a chunk of chalk or lime to incandescence. That's where "limelight" comes from.  Another was a torch that was used to melt "exotic" metals (platinum, titanium, etc) before the advent of arc furnaces and induction heating.  

Producing oxyhydrogen in a closed, pressurized container is simply begging for an explosion to level your workshop.  I've worked with it exactly 3 times.  The first time it self-ignited due to static electricity.  Thankfully, it wasn't under much pressure and simply made a small torch that singed my workbench and scared the poo out of me.  
The second time, I produced it and used a "squirt" of it from the low-pressure vessel to run a lawn mower (crappily, I may add) for about 4 seconds.  The third time the production vessel sparked internally (oops) and fire-based hilarity ensued, including but not limited to :
 Profanity
 Burnt hair
 scorched notes (paper)
 A badly abraded backside (my dad whipped my butt good!)
 And a complete disinterest in it after that

  I can't tell you NOT to play with the stuff.   But I can tell you that you're much, much better off not playing with the stuff.  

Just my $.08 worth.  (experience and a very clear memory involving my dad's belt and my backside increases the value of this advice)