I was doing Ball slams (for the first time)as part of a CrossPit inspired workout today and almost injured myself, twice.
I used a leather med ball and slammed it onto a hard rubber mat on a concrete floor. Several times the damn ball came right back at my knees instead of bouncing straight up. The first time it caught me, I had my knee locked, but learned my lesson after that.
My knee is actually a little sore as a result.
Am I doing something wrong, or is this just something I have to be careful about?