“Caddyshack” plus “Animal House” equals “Back to School” (1986). Unfortunately, it doesn’t belong in the pantheon with those other two, but it has a cult following and is worth watching on a rainy afternoon. A little Rodney Dangerfield goes a long way (see “Caddyshack”), but having him carry a movie is a too much of a good thing. This film is also extremely dated (Oingo Boingo, Robert Downey Jr. with blue hair). Still, there are lots of hilarious scenes in this story about a millionaire who enrolls in college to connect with his son. And, of course, the Triple Lindy.