miraculously saved during dangerous fall

my 1 and a half year old son was running by the top of the stairs and tripped and fell all the way down to the bottom. i heard him as i lay on the couch reading and jumped up, but for some reason i was pretty calm. he miraculously did not get hurt in any way, not even a bruise, even though the stairs are wooden with a super thin carpet layer in the middle of each individual step! he cried out of fear, but was completely fine 2 minutes later after i held him a little and went on as if nothing happened =) he even crawled down the steps a couple of minutes later =) thanks to who-/whatever protected him during the fall =)