The plot was simple: Teens unleash evil spirits on their small town on Halloween night, and the crap. Hits. The. Fan.
The campiness was so good that, if it were a pint of Haagen Dazs, it would be devoured it in one spoonful. Dick Van Patten as a dentist-turned-demon? Shari Belafonte as a vamp? Peter DeLuise as an undead jock? Pure 80s bliss. And let's not forget a pre-TNG LeVar Burton as Vinnie, one of the luckless pranksters who meets his demise in a foggy cemetery -- right before the unforgettably awesome choreographed zombie dance number.
Thank the YouTube gods for making this available to rewatch. I know what I'm doing before going to bed tonight and grabbing a handful of M&Ms...