Dangerous wall mounted cabinets

I work in a cleaning company. Our main customer is a big network company and my job is everyday the same. I am responsible of cleaning server rooms. You cannot imagine the dust that is covering all the devices in this place. My work is quite responsible because of it depends how the cooling system will work. I also check the ventilation systems to prevent them of being overfilled with dust. My work is rather hard and the special vacuum that I wear on my back is pretty heavy. But still I like my job. Especially Fridays when I only have to clan wall mounted cabinets. It is easier job because I use only a brush and dusters. wall mounted cabinets are smaller than big server racks or other closets and are easier to clean. Unfortunately I had an accident when one of the wall mounted cabinets fell down on my shoulder while I was trying to clean it from the bottom. It seems that I pushed to hard and screws fell of the wall. Anyway my shoulder bone was broken and the cabinet was destroyed. Luckily I will not have to pay for the damage but I will be back to work after two months. He doctor said that I will have some problems with lifting heavy objects but everything should be ok. Now I have some time to rest but I would rather be back at work than lying whole days in bed without moving. Well accidents happen.