The video explains the increased exposure/risk of finger & hand injuries by the fact of everyone having twice the number of hands opposed to the main body trunk & ten times the number of fingers.
A rig visit highlights the potential hazardous and risks and illustrates crew sizes of (10) & (30) persons having total fingers exposed to hazards numbering (100) & (300) respectively.
There is a demonstration in rolling tubulars and the increased risk to finger & hand injuries. A rig crew assembly of (30) persons on the rig floor illustrates (300) finger on the rig location potentially exposed to hazards.