I Can Do Martial Arts In My Sleep

My boyfriend practices martial arts.

The first time I sleep over at his place, we are both asleep, when all of a sudden he hits he me quite hard in the forehead, waking me up.

I shoot up and look to his side but he is fast asleep. The next morning when I tell him about it, he can’t remember anything of it. But he could see a nice red spot on my forehead, suggesting I wasn’t lying or imagining things!