Flip the sleeves of two jackets inside out. Hang these jackets over the backs of two chairs. The chairs are with their backs to one another at a distance of 1 meter.
Lay a 2 meters rope under these 2 chairs. Both of the players stand at their chairs. On hearing the warning sign, they get their jackets off the chairs, flip the sleeves out, put them on and do up all the buttons.
Then every "fireman" runs around the chair of the rival, takes his seat and pulls the rope. The 1st person to deal with the task is the winner.