you dont need anything other than
you.
when you reach the point you want to create tension,
and thats what your talking about here,
you just.................................
..................................................
.................................................
.................................................
shut the f**k up for a 3 seconds.
and on the 4th second you do the reveal.
if you add a flash, or a bang, or a blonde running around bearing her boobs, your adding to the effect, but your not creating the gap.
and its that gap that adds to the effect.
take teh example i have already given above....
Geoffery Durhams classic torn and restored paper.
he slows down, with the bits in his hand.
he says
" and the news paper is completely restored
. He pauses.
Thank you
. He pauses...1,2,3...
then restores the paper, and patters loudly and fast as he shows the inside of the newspaper.
now, the reason behind this, ( ive not read his book yet so im guessing, it definatly is the reason why i do it )
is that for that split second the audience think that its gone wrong, then they think its a gag.. then
oh my god it really has been restored!!! Id better clap that!!!
and they do.
so you see, you dont use a physical thing to time another effect. that's misdirection, no. the only way to create the state you are after is...
TIMING