I did a sketch of this further down on my blog but the final color is much better. Park swings are a safe enough that you feel you can horse around on them and so you swing yourself higher and higher until the experience feels as unsafe as possible. At least that's what I used to do.
I did a sketch of this awhile back and I wanted to make a photoshop painting of it. Makes me think of how we only have vague ideas of what things are and how they are, until we experience them first hand.