Around 30 competitors braved Belgrade's 3-degree wind dressed in next to nothing.
If the team stay on course until mid-February, Diana Carrington, 60, will become the oldest ever transatlantic rower.
Here's our selection of this week's best videos from Euronews' No Comment section
"You feel like you're about to fall to your death," said one person after trying the attraction
Frenchman Valentin Delluc soars his way across the Bossons glacier guided by the light of the moon and an LED.
An 18-year-old from France has set a new world record in walking blindfolded in a slacklining event in China