In my early twenties I dated a young man who was deaf. I had taken a few years of American Sign Language when I was younger and it is amazing how quickly you pick up on it when you use it on a regular basis (I can barely speak a sentence nowadays).
We were driving down the road one day and since I was behind the wheel, he would speak verbally and I would do sort of a one handed sign back, then we’d talk more at traffic lights. A friend who hadn’t met him happened to see me at one of those traffic lights and remarked on it the next day.
“You sure were excited to see me yesterday.”
“Huh?” I said “When did I see you?”
“At that traffic light” she said, sounding kind of astonished.
“I don’t remember seeing you” I responded as I mentally went over the day in my head.
“Well you must have because I looked over and you and that guy were just a waving!”
~giggles~ We still laugh about that.