What a servomotor (or any facilitator of motion) is
said to do when it loses contact with its motion controller.
The motion controller can cause the servos to run away
if the control program is not designed to know how far it
can go and compensate for it. Most systems are designed
so there are limit switches to cut the power to
the motor in case of hitting a limit, so it doesn't depend
on the software to save it.
Similar to a race condition in software. | 
