Babys arms stiffen up

I made a post a couple days ago about my 6 month old tensing up and getting stiff. You’ll notice it in both videos looking at her arms. Has anyone experienced this!! I did reach out

to her doctor we are going FRIDAY!

Update: The doctor said those movements were normal and part of her reflex’s oddly enough she hasn’t done any of those movements since Wednesday !!! Also to the mama who said her babies did that when they had a tooth coming in I just noticed last night that her first tooth is coming in :)

Thank you ladies for commenting :)