Paras 10 is a 10 mile cross country run with a 35lb rucksack. My team have no chance of completing this challenge without me. They show occasional Impressive bouts of strength and gumption but when they're down in the dirt with no sense of hope ill be there to pick them up and carry them to the end. 

Similarly there are firefighters across the uk who, when they've done their knees in heroically falling through stairs or are having to cope with the physical and mental strain of working til 60, can rely on the firefighters charity to get them back on the straight and narrow.