The bottom set of horizontal bars illustrates the enablers: knowledge management and quality risk management, which are applicable throughout the lifecycle stages.
These are horizontal bars, so they're across and you you hang on them with your arms so your body hangs down and when you hang your feet are off the ground.
So at this point, Harry is gluing two steel cylinders together, one attached to a wire hanging from the ceiling and one attached to a horizontal bar for Gary the host to hang on to with his arms above his head.