Hi doctors my baby is 6 months old, while playing with my baby, I placed him down on carpet he played and he was shivering suddenly dunno, so I took him in my arms, so he was fine, and I again placed him on carpet he started shivering (frightening) this time and started crying,I took him in my arms he was calm then , I placed him on my bed mattress, where he was playing fine and happy, the. Again just to check I placed him down on carpet he again got frighten and started crying what could it be, he is been playing on carpet since 5 months but never this happened, was he frightened or was it a spasms?