Growing up, my little brother used to clap in the house. He started when I was around ten years old, and he was six. He'd enter a room and clap clap clap.
Drove me nuts.
I told him to stop it. I told him to stop with the clapping already. I yelled at him. I did everything I could to get him to stop with the GD clapping, but he continued until he just grew out of it.
Around the same time he grew out of it, I grew into it. I randomly clap when I'm walking. When I don't have anything on my shoulders, and my arms are swinging free, I'll clap and make other percussion noises with my hands.
Last night, after Kris and I crawled into bed, but before either of were really settled down to go to sleep, I got back up and wandered to the bathroom. After doing my business, I returned and crawled back into bed.
"Do you think you might have Tourette's?"
"Wait a minute. You have every other disease known to man. Why not Tourette's?"
It was then I realized I had announced my return to the room with a single clap.