Jongleur
Youtubes of Koert in action
- At Valhalla with Disco Juggler Rik Sietzema
- Promo Ring for Service
- Revelations Part 1
- Revelations Part 2
- Revelations Part 3
- Ring passing NJF 2011
- Ring Passing Haarlem 2009
- Dvbbs and Borgeous – Tsunami
- Making of Tsunami
- NK performance Rings 1st place
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