500
What is this an example of?
"Bobby Holloway says my imagination is a three-hundred-ring circus. Currently I was in ring two hundred and ninety-nine, with elephants dancing and clowns cartwheeling and tigers leaping through rings of fire. The time had come to step back, leave the main tent, go buy some popcorn and a Coke, bliss out, cool down."
What is extended metaphor