The first thing that caught my attention watching curling yesterday was the shoes on ice. There were no skates. The second thing was the rocks in motion. They are so symetrical that without the handles, one might not know how their position shifts when the thrower sends them flying on the ice. But the handles are relatively large and bright colored, and you can see how the rocks sway from side to side as they speed forward by the movement of the handle.

Watching the handles, I noted an odd little quirk. As the end of the handle swung my way, there was a gap in the handle's location as it rotated - like a blink, or like a portion of a second was skipped. It was like watching a second-hand smoothly circling a clock and abruptly skipping a beat. Either a glitch was occurring in my perception, or something was happening physically, some interaction of the stone, the earth's pull, the rock's speed, and the rock's spin (and perhaps the perception of the viewer). I've seen videos of hi-speed jets taking off where it looks as though as much as 2 seconds were skipped as the jet broke a certain speed. Onlookers are suddenly in a slightly different location.