I remember school friends who had peculiar physical things, e.g., double jointed elbows, touch their nose with their tongue, feet that they can turn to point almost in the reverse direction, rolled tongues, and very, very, very smelly poots. Those are all gifts.

Can you do any of these?! I cannot.

My sister can do that lol. Just the left can move and the right one stares ahead.

I am trying to think of the concentration to move paired muscles that your sister or anyone needs. I am sure it is easier when you've done it enough times. But, if I try it once, I swear one of my eyes will stay where I moved it to and never return!

Nah she was born with the ability. Lazy eye or whatever it falls under.