French Cops Play 'Hackey-Sack'?

Those two doofus French cops parked and waiting for John Robie and Francie to leave the villa he is casing are playing a bona fide game of 'hackey sack'. I never knew anyone else played the game but college kids some years ago when I was young. You only use your feet to keep a small rubber ball in the air. I suppose it has a French name.