Dangerous playground equipment - GIF

[hemmjo]

Unless it has some sort of ratchetting mechanism, all you'd need to do would be to climb on from the other side. Or have someone heavier than the others walk the bottom arm backwards.

Yes, it's a neat piece of playground equipment. Poor kids these days don't know what they're missing.

Actually all they have to do is change the timing of rising their arms. If they can make it go one way, they can make it go either way.