people on the show would always say "NOWAMMY NOWAMMY NOWAMMY STOPPP!!!"
parts for the circuit:
camera flash (for hv - look up for other instructables on how to hack a flash for nixie power suply)
SPST switch (or button)
here's the circuit (warning i suck at drawing a schematic):
here's another vid of it working showing the various speed control
i tried so hard to make a score board for it too but it just wasn't working. i actually spent way more time on that than the finished circuit.