Two-arm muscle-up

A person in a dark shirt and light pants crouches at the base of a staircase, then launches themselves upward, using the handrail to propel their body over the railing and into the air. They land on the floor at the top of the stairs, where a group of people are standing, as others watch from the landing above. The scene takes place in a stairwell with a curved handrail and a fisheye camera view.