The method for closing breakers is to reach for the handle, then turn away from the panel with the breaker behind you. Don't look at it. Throw the handle.
This way, any arc-flash is likely to not injure your face, and one tends to run when things are exploding around them, so having your feet facing away from the panel will keep one from running into
Being left handed, I'm not sure of the significance of using the right hand, unless it is to place less risk on my dominant hand, but that only works for lefties!
Left handed people are in their right mind!