The 1980s and 90s produced a lot of bizarre public service announcements, from Knight Rider admitting that the drug war is based on hysteria instead of science, to Mr. T. threatening to pummel kids who even touch drugs. But the strangest PSA stars actors Johnny Depp and Robert Englund. In the ad, Englund - who turns 69 today - reprised his role as Freddy Krueger to endorse marijuana.

The commercial is actually a spoof from Freddy's Dead: The Final Nightmare (1991), the sixth instalment of the famous "Elm Street" horror franchise. Director Rachel Talalay wanted to take a quirkier, more cartoonish take on horror, so she enlisted Depp to help out for the death of Spencer, who falls asleep watching TV.

In his dream, Spencer sees Johnny Depp rehash the famous "this is your brain on drugs" spiel by cracking an egg over a frying pan and saying "any questions?"

"Yeah," Krueger says as he blindsides Depp with the frying pan. "What are you on? Looks like a frying pan and some eggs to me." Then he turns to Spencer and says "Let's trip out" as the opening bars of Iron Butterfly's epic stoner anthem "In a Gadda Da Vida" begin piping. Seriously.

Check out the scene here.