Slip 'n Slide - "Cool splashing fun for all ages." (1961)

When put on a decent hill with a hose up top, then stepfather added another 100 feet of tarpaper after the slip and slide.

You would think tarpaper would not be slidy but when covered with water it was slick as shit and you would hit it going 80mph from the slip and slide and just keep on going even off the end and into the grass puddle.

The actual slide by itself especially on a level surface was pretty much just used to see who could 'surf' on it with the feet until someone inevitably cracked their head pretty hard and the fun would stop

Oh yeah for sure. Get a good sprint going and throw yourself right at it and you'll slide to the end with enough speed left over to send you tumbling through the grass for a few feet more.

I have no idea how that think work.

I think, it work like those in waterpark. However, I wonder how you can keep water flow in the flat plastic bag, and how it can work on un-even ground