One challenge, in preparation for a paramotor take-off, especially with a tandem unit, is starting and maneuvering with a great deal of weight on the pilot's shoulders. 

Back in 1998 with heavier tandem units when Dufour had to prepare for flight, this situation was aggravated while waiting with 70 pounds on his back, until the motor was warmed up AND the passenger was ready.

When the pilot prepared to start, he lift the unit on his shoulders and put it on his back like a coat.  He can pull start in this position and the propeller blast blows over the glider.