why would joy trigger the instinct to jump? i can’t answer that. i’m not sure i’ve ever jumped in response to joy. i believe i’d be inclined to do something like: smile, say ‘yay,’ call someone to spread glad tidings. not better responses, just different.
i know that people do jump for joy, at least very-soon-to-be college grads do, at least girls, anyway, if you want to get all picky about it. Shown here… … Miss Lily and friends on the eve of their commencement, along the shores of a lake in northern Vermont, jumping for joy.
And Lily, she jumped the highest. Not that it’s competition or anything.