[Victor]

"...We would go by slow, turn off the key, punch the throttle once and turn the key back on. It would cause a very loud backfire...."

Great technique...I think that only works with stick shift cars, correct?

[Openurmind]

It will work on autos also as long as the torque convertor is still locked up enough to make the engine keep turning just a bit as you roll. Hard on mufflers though, makes them puff up and sometimes split a seam. But in those days we were all using glass pack bullet mufflers that had no baffles. :)

[Openurmind]

You might remember this, but a lot of the 60s and 70s model auto trans could actually be roll started if you could get it up to about 20 miles an hour.

[Keyhopper]

You should hear an open exhaust on a bike.
Sounds like a howitizer and for a bonus throws out a nice flame.
It does keep the tailgaters at Bay.