Shia LaBeouf is at it again.He spent last year watching all his own movies at a three day marathon and inviting people to touch his soul, so it's only natural he'd want to spend a day in 2016 in an elevator.LaBeouf began a 24-hour shift in a lift at Oxford Union at 9 a.m. local time Friday, joined by two friends Nastja Rönkkö and Luke Turner. He's calling it an "arts performance" and he expects students who join him in the lift to give a "performance of monologues."He'll leave the elevator on Friday evening briefly, to give a talk to students, before returning to the space.