Alex Jumelin wins Best Trick at Bmx Cologne! Posted on August 16, 2015 by Effraim — 1 Comment ↓ Photo: Elodie Jumelin. Alex Jumelin won the Best Trick contest yesterday at the annual BMX Cologne contest at the Jugendpark in Cologne, Germany! Alex was followed by Alexis Desolneux, and Dustyn Alt! Congratulations to Alex, Alexis, and Dustyn!