In 1968 I purchased my first car, a 1950 Ford club coupe. Many gril friends did not like this 18 year old car. Well I would take them for a ride through "Rouge Park" in Detroit Michigan. There is a steep hill called "Derby hiil". As we approched Derby hill from the bottom I would shift through first, second and then into netural. We coasted up the hill almost to the top, losing speed and racing engine for effect. They would scream as we rolled back down, backwards. Then I would then drive up the hill with no problem laughing all the way. I still own the Ford today.
I can provide a picture if if you want, just contact me..