(LOCAL PORN EXTRAVAGANZA) After months of hot, itchy anticipation, Hump!, The Stranger's first annual amateur porn contest, hits the big screen tonight at Northwest Film Forum. Of the 43 entries, a select 20 will screen in their entirety and compete for the grand prize—a trip for two to Las Vegas's AVN Awards (AKA the porno Oscars). Excerpts of the remaining 23 entries will be shown as well, with the winner of the whole shebang decided by you. The 6:00 p.m. and 8:30 p.m. screenings have already sold out—so we've added two more, at 12:30 p.m. and 3 p.m. (Tickets for those shows go on sale on Thursday, August 18 at noon.) After it all goes down there's a free party (featuring prizes, hot DJs, and a dildo ring toss) at Chop Suey. (Northwest Film Forum, 1515 12th Avenue; shows at 12:30, 3:00, 6:00, and 8:30 pm, $15, Ticketwindowonline.com or 325-6500. Chop Suey, 1325 E. Madison, 21+.) DAVID SCHMADER