In the 1980s and 1990s (and seemingly beyond), whenever Richard Branson did a photo op, he’d pick up a woman and sort of throw her in the air or whirl her around. There’s a Tumblr dedicated to it. I think that to be above board, this has to be a consensual act. It’s not 100% clear here whether the act of sister throwing that tales place in this comic is consensual. Poor Glenn just has to treat it as another culture’s peculiar ritual.