A touching moment

Xavier and I have a game we like to play together. I'll sit on the floor and he hides behind the couch. I have to call for him but I have to use a silly voice when saying his name. I'll hear a burst of giggles from behind the couch. Then sometimes he makes me go through an act of fake crying about how I miss my baby, where is my baby.
When he decides the time is right he'll run out from behind the couch and sprint over to my lap. I have to make sure I have my arms wide open because if I don't he will actually take the time to stop, pull my arms out and apart, run back to his starting point, and then sprint to me again.
Earlier this evening we were playing this game. All was going well until he jumped up from my lap and slammed his head into my lower jaw. I could almost see the little birds floating around the top of my head. My husband, who was laying on the couch beside me, could hear my jaw pop on impact. Surprisingly, Xavier never cried. He stood up and inched away from me. The shock of pain wore off fairly quick so I signaled to Xavier that we could continue on with our game.
I opened my arms, he ran to me, but this time he tried to wrap his arms around me. He snuggled up on me as though he was trying to apologize for accidentally hurting me. I wrapped my arms around him and we sat like that for at least 5 minutes.
There was something so special about that moment of time.
My Xavier, he's a good boy.