Using a toy Mustang, a trailer with weights attached, and a conveyer belt.
This shows why you should always ensure your trailer is weighted towards the front, unless you have a giant hand available to catch you.
(from Ontario Police Commercial Vehicle Committee
A fascinating short video on why weight distribution matters so much for trailers. This is the season where many boats will be trailered to their winter storage location. Well worth knowing what could happen with big outboards on the back.
(video credit @OPCVC)