Falling down the stairs...

So me and Jaxon went up stairs to change his clothes and diaper. We have a baby gate down stairs so he won't go up but we didn't have one for the top. Well I had just got done changing him and putting clothes on him. I turned around to throw away the diaper and he took off. I ran out of the room. Jaxon loves to be chased so I didn't help by sprinting out. He thought I was chasing him at this point. He was at the stairs and knows that he is suppose to go down them backwards but he decided this time he was going to take a step down. Needless to say the little guy didn't make the step and tumbled all the way down. I was chasing him all the way down the stairs but couldn't catch up to him. I was crying, he was crying. He fell all the way down. I picked him up and freaked out. i was feeling him everywhere to see if there was anything broke or hurt. He was fine after I picked him up but I still was freaking out. geez... scary experience. He bit his lip and had a little bruise on his head but was fine everywhere else. Man was he lucky! Scared me half to death... You would think he would be scared of the stairs but no that same day he went for them again. That little stinker. We are getting a gate for the top now. I sure don't need any more scares.