Complex sentence: This annoys the rabbit and prompts him to slap Toro on his nose, thus causing Bugs to be head-butted out of the bullring, prompting Bugs to utter his famous declaration while in midair.
Split into simpler sentences: This annoys the rabbit and prompts him to slap Toro on his nose. Toro responds by head-butting Bugs out of the bullring, prompting Bugs to utter his famous declaration while in midair.