Bitsy caught her bottle fly before Itsy got her's (itsy's the one that pounced in the video). Then Bitsy couldn't figure out how she was going to get her cargo up on her nest. XD Bites of Phidippus johnsoni are not generally harmful to humans unless you're very allergic to spiders. Never been bitten, but I imagine it's very itchy like a common sac spider.