: Scissor lifts include a built-in safety arm that must be deployed when maintenance is being performed within the scissor links to prevent crushing hazards.
: To prevent accidental movement, most controls require the operator to simultaneously hold a "dead man" switch or function enable button before any lift or drive actions can occur. Genie Lifts Manuals
: In the event of a primary engine failure, an auxiliary pump or power unit allows operators to safely lower the platform from the air. : Scissor lifts include a built-in safety arm