Sitting Up at 5 1/2 months

Parker started sitting up on Wednesday night!!! After I changed his diaper, I sat him up on the changing table, and he didnt fall over. Its like he just decided it was time. Then BAM he sat up and did not even begin to fall over! And if he does get off balanced, he reached his hand out, and catches himself! So of course, Im super proud of him, bc he is only 5 1/2 months old and he is such a big boy, so Ive taken about a thousand pics of him sitting up.