It would do the fire column due ot turbo charger lag, as the injectors were putting more fuel in, but it wasn't burning it all.
So it would smoke like a monster first.
And then the turbo would kick in, and the flame column would shoot out.
Buit I am assuming you are correct that one would not want to try and move the throttle more than one or two throttle positions at a time.
that's crazy....5 feet of fire....that's what you said? wow....that would be kind of scarey, i'd say.