From the LA Times:

“Chocolate raiiiiiin,” belts Zonday again and again, in a voice so cavernously deep that it couldn’t possibly be coming from the skinny, sweet-faced young boy on the screen (he’s actually 25). “Some stay dry and others feel the pain. Chocolate raaaiiiin.”

Helping this refrain to super-glue itself into your mind is the short, looping piano phrase that is the song’s musical backbone. The riff is replayed, with minor variations, something like 50 times — the same number that Zonday chants “Chocolate rain.” This repetition is such that a single viewing will have you twitchily blurting these two words for hours afterward, disconcerting friends and strangers alike.