Lol that’s so funny! I have no advice since I’ve never seen it but I bet it’s fine. And I also want to share A picture of my daughter when she was a baby, sleeping funny.
As others have said ,its the startle reflex. Does your baby sleep well? If not, consider swaddling. The startle reflex eakes them up but swaddling, although it feels mean, does wonders to keep them sleeping and you rested!! We were so pleased once we realised the benefits and did this with our first! We are doing the this with our 2nd much earlier!
That’s the sweetest pic I saw today 😍
Omg... these pictures are the cutest things everrrr!!! 😍
It’s Normal, my little boy used to do it when he was a newborn and he stopped doing it as soon got older.