What happened to this old-man is unHuman.(Air-exploding chair at mechanical garage)

This video shows a group of resting co-workers outside a mechanical garage in south of johanessburg,Gauteng South Africa.

The old man is seen relaxing on the chair that was specially prepared for him to sit on by his collegues knowing the air-trigger would go off after the supression,It tossed the poor old man at 20cm away and everything he had on his hands scattered all over the place,his mobile phone's display was broken during this event and the man who is supposedly his collegue kept on loughing and recording every angle of this embarassment instead of helping up.

This simply shows that some people do not know what humanly love is,this makes you wonder if these men have got any family or old-parents.I am shuttered.