I'm going to congratulate the soccer player that knocked his teammate over.
Why would you congratulate someone that knocked their teammate over?
I thought it was funny to see his expression when it happened.
Knocking your own teammate over is wrong and it's certainly not something that you would congratulate someone for. You shouldn't find that funny because the player could have been injured by the actions of the other player.
I didn't think it would be this serious. I thought they were having fun.
I apologize. Context does matter. It does depend if it was in a joking way or by accident.