水しぶき splashing water

源流に近い渓流で撮影した水跳ねの写真です。
いくつか放物線が見えます。次々に跳ねる水滴が、同じ軌道を描いているようです。もっと無秩序に飛び跳ねていると思っていました。

This is the photo of the water splash which I took at a headstream.
I see some parabola on it. Water droplet splashing in sequence seems to draw the same orbit. Until now, I thought that those droplets jumped up and down disorderly.

1/10sec, F8, -1.5EV, ISO800, 75mm (aps-c), without light device