Put simply for the non-rugby fans, this is what's called a line-out, where a player throws the ball into the field from the sidelines, and players lift each other in order to gain an advantage when trying to catch it. This was shot crouched down on the sidelines looking up. The cold night and floodlights added to the drama.
70mm, 1/640, F3.2, ISO 2000
I din't know about the moody lightning but the photo is beautiful, really nice work and great timing. Love it