massage after IM injection?

[mt_nurse]

So I'm reading various reference books, and it's telling me different things about what to do after an IM injection. One book says to discard the needle into a red bin right away while another says to massage the injection site first. I would choose to discard the needle first. So what is the better way?

[PedsAtHeart, LPN]

Maybe if you do it hard, but I dont see a gentle massage doing that. An IM injection should be deep enough into the muscle anyway that none can seep into to SQ layer.