Seppuku

I was moving my car today and it was rolling forward very slow and i put it in reverse with the clutch all the way in. As i got it into reverse it seemed like the gears binded and then popped free, the car shook a little and then stopped. I heard a mettalic spraping sound for a split second at about the middle of the whole thing. I could stil drive in reverse so i went ahead and finished moving it then stoped and played with the shifter for a second. Reverse is now different instead of fealing like i have to push it into the gear it just goes right in and is almost like im not in the gear. Its almost the same as moving it around in nuetral. Anyone have a clue as to what could have happened?