While on the subject of explosive pyromania...;-)  Anybody ever do the
thing
with aluminum foil, a bottle and is it sodium hydroxide?  You fill a balloon
with
H2 gas and light it.  Since H2 becomes smaller when it oxidizes, you get an
implosion.  Seems to be more benign but still flashy.  Done in a test tube I
remember it whistles.
     Loren