Batman and Robin took a break in a busy laundromat after a long and dirty night of crime fighting. Robin fell asleep to the sound of the washing machines. A loud noise awakened him, and Robin's head swung automatically toward the snort-laugh sound. What a sight! Robin couldn't take his eyes off Superman awkwardly spinning Lois like a helicopter.

Describe Robin's brainstem arousal, from deep sleep, to turning head toward sound, to hearing the laughter and seeing the awkward dance. Include the functions and locations of the reticular formation (what happens here? What is the purpose?), the reticular activating system, the superior and inferior colliculi, and pathways involved in hearing and seeing Lois and Superman.

Please give me the correct answer with explanation.