Oh, Harrison meant skiing with skis:
"But, cautions Schmitt, "moondust is much more abrasive than sand." Typical grains of Earth-sand measure 250 to 500 microns (millionths of a meter) across and have rounded edges. They easily slip, slide and roll. A typical grain of moondust, on the other hand, measures less than 100 microns wide and has very sharp edges. The fine grains lock together "like Velcro," says Schmitt, "and scratch anything that comes in contact with them." A Teflon ski-coating might not last long.

Time to invent a new material? NASA is going back to the moon, with a first wave of astronauts due to arrive in 2018 or so. The long-term goal is to establish a permanent outpost. Skis and sleds might come in handy for workaday transportation or weekend recreation.

Schmitt wishes he could go, too. The powder is out of this world."
http://science.nasa.gov/headlines/y2006/17jan_jack.htm