Sentence:  Any piece of equipment that raises people presents bodily hazards related to falling in the event of upset or collapse. However, this section's “Case Occurrence” is a good example of a powerline-contact hazard specific to an <WSD>aerial lift</WSD>, and shows the lift boom as a "dormant" hazard. 
Meaning of the word marked with <WSD> tags:  A device for raising people and/or equipment by means of a bucket or platform attached to a boom or expanding scissors-style supports.