My youngest child is a climber. It wasn't a complete shock to me, his older sister was a climber too and had fallen off the dining room table and split her head open by the time she was 12 months. Her 2nd glue-job was when she was still under 4. Thankfully so far those are the only trips to hospital with small people who have fallen, however that is some sort of miracle.
Aged around 18 months she climbed barefoot to the top of our 8 foot tall wooden garden fence. Sadly no adult is able to climb up a fence like that, and I actually had to leave her up there and run into my house , go all the way upstairs to fetch a
stepladder and not trip up on the way back to get her down. She thought it was hilarious, she could see the neighbour's dog and she liked dogs. And cats....(I don't have a picture of a dog and I've heard cats attack you in the night if they think you are the enemy).
We knew our youngest was inquisitive, and more than a bit lively, from very early on. A walker by 11 months, he had already learned how to undo stairgates by twisting the two bottom supports until they were loose, and then just pushing the gate to crawl under it. It was no coincidence the gate at the top of the stairs was screwed completely to the wall.