My son is almost 9 months old and recently he will be playing and all of a sudden he starts crawling away super fast and screaming like he is scared of something, he does it with all different things, he does this when he wakes up from sleeping most of the time too, earlier him and his father were playing on the floor, and hubby rolled and junior screamed and leaped over him, idk whats going on, is it just a phase?