Hey everyone,
Ihsyius is back from his vet visit, and although crabby from being manhandled I'm happy to say that (200 dollars laterI'm so happy the vet lets me pay in installments) he is sore, but suffered no permanent injuries.
The vet took two x-rays and his spine/ribs/organs (though he really has to poop!) were all a-ok, and nothing felt out of place on the physical exam, so thankfully this time it was just a muscle soreness issue probably from pulling it or straining himself.
He got a painkiller shot of metacam to keep him comfy so he wouldn't be put off food by discomfort (it was that or pin him down 1x daily for a week to dose him by mouth...nu-uh not happening) and wasn't a happy camper about it but is now safely back in his tub and resting---the pain meds kicked in on the way home and when I took him out of his bag he seemed to be moving much better, not 100% his old self but better.