This is the action in which you are riding a motorcycle in the rain and need to eliminate the water on your visor. You simply turn your head to the (L)eft for a few seconds and then turn your head to the (R)ight for a few seconds while going 90 mph.
I was riding on my R1 to Indian Lake (logan county Ohio) when it started raining. I had to turn on my LR 90 wipers to even see the road.