Story found here:
https://www.facebook.com/Marco.Laurenzi.89/posts/1599931943463543

We were shortly after the start, under a line of cumulus, in
convergence, at 2500 meters towards the first turn point, when the
constant "beep beep" of the vario (0.5 ÷ 1 M / s) gently became more frequent,
so I decided to turn and climb the last 100 meters that separated me from the
base of the clouds. I'm about to turn right, that's when I feel something. I
get ready to undo the 3/4's of VG that I had and tilt slightly to right to try
to find the core.

The air was going up faster (2 ÷ 3 M / s) when an unheard force took my right
wing and rolled me to the left in no time. The vario went from the beep beep
beep to "triiiiiiiii."

I don't remember if I was able to hold onto the control bar. In a fraction of a
second I found myself almost like in a wing over, but without the right speed
and fighting unnecessarily. From there I saw the earth and a piece of sky upside
down and gently feel my feet touch the sail, then my legs, then I lose the
control bar and hit with my head on the glider nose. It went from a sudden
and immediate event that didn't give me time even to understand to some sort of
temporal slowdown, where time seemed to scroll slowly by, until another violent
shake that threw me on to the control frame. I only realize after this is the first
round of tumbling.

Help replacing found here:
https://www.gofundme.com/support-for-marco