''When the smoke came out the stack , I presume that means...

''When the smoke came out the stack , I presume that means someone hit "full throttle" . Who`d do that ??''

someone trying to hit the brakes hard at a guess

try it -------------- they don't stop like a car

you have to go into reverse and floor it ------------ AFTER waiting for the prop to stop spinning forwards

the time in between going into neutral and waiting for that prop to stop spinning -

is the longest time spent in a lifetime - it seems like about 10,000 years