The smokescreen in the vid is nowhere near as good as the one I've seen with coolant injected in the hot part of the exhaust!

For the people that wonder 'why?':

it has nothing to do with showboating, it was a security option on a car I have here, but wasn't fitted and you can't get it retro-fitted.
Therefor I'll make up my own system as it has been proven to be very effective in the past.