Bryden crawls down the stairs

At his 16 months, he starts to learn to crawl down the stairs. In the past, he just knew how to climb up the stairs and very careful not to go down the stairs. Everytime, he gets to the edge of the top step, he would stop and not even dare to stretch his legs out. It seems that he knows it is dangerous to walk down the stairs by himself. Since yesterday, I notice that he would get himself down the top of the stairs, then push his hands down to the steps. It is funny to see him to do that without making any scary noises. You can tell he is learning to get his way around. Now, he can climb up and crawl down the stairs freely. He is getting very active nowaday.