Rolling (not riding) downhill .. equally fun but crazier ..

I enjoy riding down the gentle hill at the nearby park. Usually people only jog or cycle on the track. So the grassy slope is all mine. I thought I am the only nuts utilizing the grassy hill.

But I just found out that at another hill at a nearby reservoir, many old people had been practicing a rather unusual morning exercise for several years: Rolling Downhill.

Check out their video: https://www.facebook.com/photo.php?v=663373440401193

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Actually this other hill is higher than the one at the park. I tried to ride my bicycle up the hill but failed. Maybe you might want to challenge yourself to ride your unicycle up this hill???