The new Saw 3 trailer will have its world premiere in theatres before showings of The Descent, which Lionsgate is opening on 8.4. Not online…screens only. Drop everything, cancel the trip to the Home Depot, put off the cat’s declawing at the vet, put both cars in the garage and batten down the hatches….the Saw 3 trailer is hitting screens on the same day as The Descent. (Who was that guy in the ’50s who was known for going “Oooh! Oooh!” in low-budget comedies?)