I attempted to sit my 13 month old son on the floor to see if he could sit unsupported, and.......?

Goodness if head injuries occured with a fall of that calibre my son would be dead. He trips and smacks his head on the floor at least once a day. He`s been walking a few months, but somehow hits his head on a regular basis. Unless his pupils are funny or he starts vomiting I wouldn`t worry.