LOS ANGELES (AP) — "Abandon all hope, ye who enter here," is the inscription uncovered by a gang of 20-something treasure hunters in the catacomb-hopping horror flick, "As Above, So Below." But the warning could easily apply to viewers checking out this rather hopeless mash-up of "The Descent" and "(Rec)," not to mention a dozen other found-footage movies that have clogged the screens over the last five years.