Matt Donnelly Senior Film Writer For three decades, Halloween Horror Nights at Universal Studios has been offering live terror experiences in Southern California and Florida — primarily via a series of mazes where the undead chase crowds with chain saws and scary movies come to life. Over decades, licensed characters like Freddy Krueger and Jason Voorhees have haunted the studio backlot. But on a recent Wednesday in October, the annual attraction was hosed down not with fake blood but a slew of corporate owner NBCUniversal’s intellectual property.