Tell yours here. Ill start with one of my own experiences.
When ds was about six months old, i had laid him in his crib for nap time. I was tidying up the house and he had been asleep about an hour when i heard him screaming and crying all of a sudden. Ds was usually a happy baby when he woke from naps, so i rush into his room... Ds is sitting in the middle of his room on the floor!! I was so freaked out, i couldn't imagine how he got out of the crib on his own. I searched him over in case he managed to fall over the side somehow, not a bump or scrape on him. And it never happened again after that. Also just s few months after that he started doing something i felt was a little strange. I would go get him from his room after his nap and he would look at one particular corner in his room (where the rocking chair is) and he would wave and say bye bye. He did that every day for several months, then just stopped.