Rolling over

I was really excited when Liem rolled over for the first time. Liem didn't like tummy time at all....he would cry every time I put him on his tummy and then I'd pick him up. This time I let him cry...he started to rock, then went onto his side and then plopped onto his back. After that he forgot how to roll over for a few weeks, then he remembered again and then he started doing it all the time. Including at night when he would roll over, hit his head on the side of the cot and wake everyone by screaming. Luckily he doesn't seem to be hitting his head as much these days.