LOS ANGELES, Sept. 2 (UPI) -- Mike Judge's Beavis and Butt-Head is funny, largely because the title characters remain the same in every situation. Season 3 of the show's revival, premiering Wednesday at 10:30 p.m. EDT on Comedy Central, finds ways to evolve the characters while remaining faithful to the lovable idiots. Several episodes, including the Season 3 premiere, animate painful slapstick like the revival's best episode, "Downward Dumbass," in which Beavis gets stuck in a pair of yoga