Automated staircase for Rio 2016 Paralympics Opening Ceremony
As part of the 2016 Rio Paralympic Games, Show Canada make a retractable staircase.
The staircase is located in the rear central part of the stage and is designed to transform itself from a regular flight of stairs into 3 wheelchair ramps.
The staircase is kept in a closed position at the beginning of the show, and then its automated system moves the front section out, creating a ramp allowing wheelchair access to the athlete who can therefore attain and ignite the Olympic Cauldron. See video at 3:49:35