I do love the "place this sphere on your head to switch worlds" paradigm, but I think it's maybe too natural - every user I've demoed the lab for inventively ends up punching a controller into the visor.
Perhaps a substitute could be "stretch the sphere open so you're standing in the middle of it", with your arms outstretched on either side of you. Although this might trade smacking yourself for smacking your neighbors.
LOL. That was exactly what happened to me on the first transition as well. Good to know I'm not alone.