It's very common (and very effective and safe) to fire on a véhicule from an helicopter in the Caribbean Sea to stop a supected drug speed boad.
If the crew (pilots and gunner) is well trained, it's quite easy to shoot to the two or three engines at the back even at full speed.
The gunner is always a marksman because it's a real job to shoot without collateral damage.
And by the way, nobody remembers the "BlackHawk down" film, how the good guys stopped the car of the very bad guy ?!!
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