"Brian Gaff \(Sofa\)" wrote in news:rsn3i6$l9r$1
@dont-email.me:

I'm told the bang is merely accidental due to the use of the mortar
principal to launch the pretty bit skyward. They are, supposedly more
controllable than rockets, but maybe people should simply hire a huge
screen and do a cgi display instead.
Brian


Or laser show onto generated smoke or mist

Perhaps Fire and Explosions had a primordial appeal.