I noticed this upside-down spider on a leaf and guessed that it had been recently stung by a wasp and paralyzed, so she could haul it back to her nest/burrow and lay an egg on it. Sure enough, within a few moments the wasp showed up. Over a period of twenty minutes she flew away and returned several times. Each time she returned, she'd inspect the spider, then hang out and groom herself a bit and fly off again. Maybe she was waiting to make sure her venom had completely done its job of paralyzing her prey? In any case, it was an interesting interaction. (Malaysian Borneo)