The invisible guest (Contratiempo) (№ 390934)

You know what non-linear thinking, Signor Doria? It means changing the approach to the analysis of the problem, so you can get to the bottom.
For example. There are empty wooden barn, where the man hanged on the Central beam. The rope with which to hang the body, three meters in length. Distance from floor to foot or thirty centimeters from the hanged man to the wall six meters. Before the beams can neither jump nor climb. Nevertheless, he was able to hang himself. Any idea how?