Physical mirroring?

Not sure what to call this. I have an 11 year old son and very often (not always, but in many instances) a minor physical injury or ailment will manifest in both of us at the same time. For example, on Thursday, he was at an evening event and fell hard while chasing a hayride. I was at home, and tripped and fell into the coffee table. When I picked him up a bit later he was eager to show me his bruised and swollen left knee and scraped right elbow. I had the same bruises/ scrapes in the same places. This happens all the time.

A couple of weeks ago I burned my thumb on a hot glue gun, resulting in a blister. A few days later he showed me a blister on his own thumb. Pulled muscles, bug bites, canker sores, stubbed toes...all minor, random incidents with visible identical manifestations or comparable evidence have been consistent for as long as I can remember. It would make sense if the event causing the mark happened in each other's presence - maybe one of us subconsciously imitated the other. Or if it was environmental, like allergies or a sunburn. Or something contagious like a cold or fever, or a hereditary symptom (well, other than clumsiness, lol). But these examples do not fall into a pattern like that.

Anyone have a similar, persistent experience?