[oofdoof]

Some years ago when I still had my 2009 Macbook Pro I noticed that if:

- The laptop was charging

- I was touching the laptop with one hand, and either (my memory is fuzzy on the details by now but it was one of these two circumstances):

- A friend was touching me on the side of the forehead with one hand and touching a crack on the wall with the other hand

OR

- I was the one touching the crack on the wall with my other hand.

Again, I don’t remember which of these last two. BUT I remember the result: I would see banding with my eyes (very similar to what you see with cameras when their shutter doesn’t sync with AC power).

Now, our eyes don’t have shutters so I have no idea what was going on but I saw it.