The flight through the clouds wasn't planned. Instead of dissolving, the clouds suddenly started to push into the valley. Quite a few pilots (including instructors and experienced tamdem pilots) were surprised.

Unfortunately the video cannot get the full experience across:

1. Hovering 50m above a closed cloud cover with the sun shining and then softly diving into the floss :D. I have to admit: It's magnificant and scary at the same time.

2. Your sensation of time is altered when fly through the clouds. It feels way longer than it actually takes and everything is quiet/damped.