The riff: Sung in a deep voice by Crow as the freezer hawker (this is a sales video for freezer displays) claims a display case gives your product “real floodlight attention.”
The explanation: He’s doing a parody of Neil Diamond, from the 1982 song “Heartlight” off Diamond’s album of the same name. It reached #5 on the Billboard Hot 100, and is to date Diamond’s last Top 40 single. It was apparently inspired by the movie “E.T. The Extraterrestrial,” which I suppose explains the reference to glowing “heart lights.”
Novelty factor: I had no idea. I kind of had to search some odd combinations to find an explanation, going from “flood” to “heart.” It is sometimes difficult, doing this blog, to know how exactly to tackle looking up the meaning of a riff.