Reckless, adj.
Any instance in which a given object is imposing immediate danger or potential harm to any surrounding objects, ie operating outside of controlled boundaries.
"The moron drove recklessly through a public road without considering the chance he might kill an unsuspecting person or object."
syn.: haphazard, uncontrolled, inconsiderate, etc.
ant.: safely, rational, etc.
Just typed that off the top of my head without actually verifying but whatever.
Basically anyone can mash their gas pedal to the ground and turn the wheel, but given the boundaries and terrain of any public area it is not possible to make sudden adjustments to your trajectory while maintaining a perfectly controlled and safe amount of personal space.
Now a highway and a certain 4-wheeled vehicle is a different story.
