Fast food creations come and go, but even some of the most unpopular items live on in infamy on YouTube, where they'll hopefully be enjoyed for generations.
We've assembled some of our favorite ads for dishes of yesteryear, including one with a singing-and-dancing Jason Alexander (the McDLT from McDonald's) and another with Haley Joel Osment as a toddler (Pizza Hut's Bigfoot pizza).
Looking back, it's hard to believe that some of these items were ever made. Why did McDonald's think pizza was a good idea? How did Taco Bell sell Taco Lights all those years? And why was one Dunkin Donuts' commercial so offensive?
Ponder these questions and more as you scroll through the below slideshow.