|As a 1-year-old pup...
This reminds me. I almost got lost once too, when I was younger. Someone was stepping in through the door and I took the opportunity to dash out. I was curious and there were so many different scents... I just couldn't resist! I wanted to run off leash too! (My recall wasn't all that good last time so Mum didn't want to let me off leash until she could trust me to come back when called...)
I climbed up the stairs to the next few storeys above, but Mum caught me in the end. Mum didn't scold me, but she made extra sure that I wouldn't be able to run out ever since. Now that I am a dog of almost 4 years, I know better than to run out!
Wouldn't it be scary to be lost? :(