Leidens Ontzet 2012 – Polstokspringen – Ambulance for the wounded

One young man didn't "tip over" and fell back on the stone quay. He was not seriously hurt and managed to get out of the water under his own power.

Or fierljeppen, which means "far-leaping". Also known as Pultstock-Jumping or Ditch-Vaulting. The object is to jump across a body of water, in this case the Rapenburg, with the aid of a pole. More info here: en.wikipedia.org/wiki/Fierljeppen

Celebration for the Relief of Leiden in 1574.