jackin' the beanstalk
When you're so obsessed with the beanstalk story that you think you're actually Jack and you're jerkin' it like it's a real thing.
I was jackin' the beanstalk while eating my dinner.
At school, I was jackin' the beanstalk during lunch.
My brother was jackin' the beanstalk in the hallway while pretending to be a wizard.