A body continues in a state of rest, or motion with a constant velocity, unless compelled to change by an unbalanced force. This law is often violated in movies with excessive BIM, a good precursor to a high double action rating. Prime examples can be found in movies directed by John Woo, where motorcyclists find their bikes continue to slide on pavement for distances up to a mile after they have fallen off of them. Another example can be found in The Long Kiss Goodnight, where an 18 wheeler continues to slide for almost a mile after toppling over, giving Charlie a prime opportunity to leap off onto another vehicle. Clearly these movie events occur in a frictionless world, where double action viewers reign.

An object at rest or in uniform motion in a straight line will remain at rest or in the same uniform motion unless acted upon by an unbalanced force. This is also known as the law of inertia.

a body remains at rest or in motion with a constant velocity unless acted upon by an external force

See "First Law of Motion".

A body continues in its state of constant velocity (which may be zero) unless it is acted upon by an external force.