It's different as an adult, isn't it? As far as that child's childish shouting "I'm going to run away! You'll be sorry!" If that didn't work, I would throw in something like "I'll get hit by a truck and you'll never see me again!" That was a kid angry over a parent's discipline or dreaming of adventure and freedom from grownups. It's a burst of temper or excitement.... and it fades when the emotion fades.
As an adult, I get it when I feel besieged on all sides. It's a desire to escape, even for a while, from life because it's out of control and I can't be the one to get it back in hand. It's being tired from handling those things for a long time.
I joke with John sometimes, "Let's just be gypsies. You, me, and the dogs going where we want."
You don't have to tell me: "No matter where you go, there you are." I know that.
But for awhile, I'd like to run away and have adventures before I come back.