Do you see any light?

Son: Mom, did you see any light when I was running so fast?
Mom: Light? What light?
Son: Light .. lightening .. coming out of my head when I was running so fast? 
Mom: No, I didn't see any light!
Son: Wait! I will run again and then you watch carefully!
Son runs as fast as he could .. from one end to another 🏃‍♂️🏃‍♂️🏃‍♂️
Son: Did you see it .. did you see it?
Mom: Well .. yeah .. I think I did 🙄