Ladders are notorious for being associated with serious injuries, and like any piece of equipment, their use should be risk managed.  While the majority of fatalaties identified in the Monash University Accident Research Centre study were from use of ladders in the home, predominantly in the older generation, the lessons are the similar for the entertainment industry.  Read the full report at:  http://www.monash.edu.au/muarc/VISU/hazard/haz63.pdf