This joke is funny because Neil's outfit features the swirly rainbow colors seen in gas station water puddles. Note: The thin layer of oil floating on top of the puddle refracts the light, which then bounces back up off the water, splitting the light rays in rainbow colours. https://t.co/IRWDNR5e5S
— Explainer of Jokes (@JokesExplainer) Aug 19, 2022