Being in reverse
Does a tire with a slow leak lose air when you are driving in reverse?
Shift to reverse
You should reverse down a steep incline (slope) when driving a forklift that has a load on the forks.
14 feet
14 feet
reverse to the spot instead of driving forward
While I couldn't fine a specific law against reverse driving, you would probably be pulled over for reckless driving. (: Most jurisdictions have a sort of "cover all the bases" bad driving law, usually called something like careless and imprudent driving. If a police officer feels that whatever you're doing is likely to cause an accident, you can be pulled over and ticketed for this, even if there isn't a specific law covering precisely what it was you were doing. Driving with your feet, driving while barefoot, driving in reverse, or driving from the passenger seat are all things that could result in you being charged with C&I.
The override button is used when driving in reverse, it's used when you need to go faster then 5mph in reverse.
A person driving in reverse is always at fault.
It is not possible unless you are driving a very very old car. The reverse gear is mechanically blocked by a synchronizer to prevent exactly this kind of thing.
A reverse camera is a backup camera system, in other words, a camera that is installed on the back of a vehicle and transmits images of what is behind the rear of the vehicle to the driver. This aids the driver when backing up, or driving in reverse.