Water Slides - SL
Found a couple of cool places and even had a Corona at a little hut beside a beach. Very cool. I then traveled to a place called Maryland (a relative or kindred spirit maybe?) anyway...it was a "prop" place where you could try on and try out different s&m clothes and props. Hmm...I no longer believe it was a relative!
Then I found a water slide and actually got to slide down it. Much more my speed!
I think SL could be used to explain all sorts of hypothetical science materials, let alone the capabilities of self-paced instruction in anything where the student moves through space/time as they conquer and understand material.