See also:

Why Safety Belts Work
When you ride in or on anything, you go as fast as it goes. Take the simplest vehicle. Suppose it is just a seat on wheels. Put someone on it. Get it up to speed. Then stop the vehicle. ...

Safety Chains
Always attach chains between the vehicle and the trailer. Cross the safety chains under the tongue of the trailer to help prevent the tongue from contacting the road if it becomes separated ...

End a Call
Push . System responds: “Call ended.” ...