Fingers...
Whilst i quite like the "human-scale" analogue of "riffling your fingers through" the liquid, I think it's a little irresponsible and clearly unscientific to forget to note that you would suffer immediate skin burns and very rapid deep frostbite from immersing human flesh in a cryogenic liquid.
As for how the liquid lake feature would feel if one were to step in, "Liquid ethane-methane mix would be less viscous than water," Brown said. "If riffling your fingers through it you wouldn't feel as much resistance."
So folks, if you get liquid nitrogen burns, tell them that Robert Brown of the University of Arizona's Lunar and Planetary Laboratory in Tucson implied that it was a normal experience, and you were surprised when your fingers turned black and fell off!
Hey, I rather like that we've nailed-down a "planet" (moon) where water is NOT the active liquid...