It shouldn't go out of control unless there was something mechanically wrong, or the rider was not paying attention or riding faster than their abilities, or too fast for a road that they weren't familiar with. The last part happens all the time.
If you're responsible, do what you can to make sure your bike is mechanically sound and don't ride too aggressively on roads you're not familiar with, or even on bikes you're not familiar with, the chances of 'losing control' can be diminished alot.