How about a plugin of a lot of bees (either taken from a documentary such as "Microcosmos" or made digitally) just flying around that you could lay over a person. Something like a sqaure with orange specks zipping around inside for closeups and a variation with a flying mob for longer shots. Remember those movies back in the 70s where they put stock film over the actors? That is what I'm going for. Just an idea.