My little boy is 7 months old, he’s started doing this thing when he’s in his high chair where he tenses his whole body clenches his fists and strains to the point where his head shakes and he goes red… sometimes he will laugh or smile after but it’s pretty random, he will only do it when he’s in his high chair I’m a bit concerned as to why he’s doing it? I know he’s not straining for a poo because he’s literally just had one… does anyone else’s baby’s do this? Thanks 🙈