Many years ago, on an operation, we were doing our best to get acclamatised and and hydrated (sunbathing and bar proping) so the boss decided that some sport was called for.
Aircrew duly assembled for Volley Ball - not too demanding and deemed safe.
Half way through the first set one super fit Nav jumped, did a double handed wham over the net but lost his footing on the wet painted asphalt.
As he crashed backward he put his hands behind him and broke both risks. As we were running at 1:1 aircraft crew ratio 25% of the force was immediately f
d.
We caancelled the volley ball competition and instead concentrated on sea survival drills several times per day. The Marine craft even took us out to use dinghies once as well.