Bruce L. Bergman wrote:
.... Propane can
easily make a puddle of unburned gas that stays over the water surface
and builds up, and when it finds an ignition source it can suddenly
get VERY exciting.

YES! What a great idea! Much cool-er than the "...floating flame
effect" that Jerry was talking about. Depending upon the size of the
pond, you could have pipes at random locations, giving off fwoosh'es or
whoomp's of random intensities at random times. Could be a neat show.

It won't take much of a breeze to create problems, though. And the
ignition source might be a challenge.

Hey, Chipmaker could do this in his pond, integrated with his fountains.

Boy, that gets the teenage boy in me really excited.

Bob