We then did Uchikomi followed by Ne-waza practice. I was trying to work on my turnovers and particularly turning uke from Prone into Kata-ha-jime. Somehow I was a little over zealous, and I managed to tweak my Uke's neck. Normally this isn't a big deal, but he was really stiff. I felt really bad - as his night was done, and I was concerned that he really hurt himself.
I know that Judo is a contact sport, and people do get hurt, but it hurts me that I hurt someone, especially when being careless.
I hope he's okay.