Two guys, John and Jake,  are training the art of parachutism.

At 12,000 feet, they jump out of the plane. By pulling the yellow cord, the parachute should unfold.
This does happen to John. Gently he floats in the air.

Unfortunately this doesn't happen to Jake, no matter how hard he pulls the yellow string, nothing happens. He's fallen straight down to earth.

John shouts to him: 'Don't make a fuss of it, it's just a practice jump!'