Remember these ?

[Water Rat]

I still have the bumps , lumps and scars from those things. I ache just looking at them. I can't remember what they were called.

[rob-c]

Yes I do and so do my ribs... 

[Bionic]

Ever see the morons spin those at about 35mph with a streetbike rear tire, lol.

We still have these in our parks system.  That main bearing takes a beating, and we have a scrub brake installed on them.

[ny hunter]

Remember a nasty bump one of those..

[Hunter007]

 Yea and I remember getting hurt from those . 

 

Edited October 20, 2018 by Storm914

[Robhuntandfish]

Only barely, the concussions keep me from remembering much...

[mowin]

Our school playground had those. Definitely got a few bumps and bruises from playing on them. 

[turkeyfeathers]

How about the one lone puddle you had to avoid pushing it around as fast as you could