Haha, well, no we do not normally do that
The short true story is that it was an training. We did enter a container area with temperatures varying from 50-200C, aim was to work in heat to show and feel the effect of it on your body. The obejective were to move 4 sandbags (aprox 40-50kg weight each) from the bottom floor to the top floor in the container area.
For the ones that know how it's like working with equiptment of 20-30kg on your back, ocygen masks / flasks, in high temperaturs, know that it's completely bastard hard lol.
My aim was not to brag, just to tell you the story behind the picture =)