Top three hazards of working at height

1 People paying more attention to 'Bubble Candy Sweet Crush Saga' on their 'smart' phone than their immediate surrounds. 2 Cat rubbing lightly against the ladder. You feel that movement magnified to the scale of a small earthquake. 3 Insects (particularly stinging/biting varieties) landing on your bare leg or arm and the particularly strong urge to flick, shake or wave said limbs to get rid of the offending winged warrior.