Tom Cruise has built a career making extraordinary risks look effortless. With Digger, however, his latest gamble is facing a problem no stunt can solve: audiences are staying away. The dark comedy opened October 2 and earned an estimated $3.4 million from 3,321 North American theaters on its first day, including previews. Saturday projections placed its opening weekend at approximately $7.5 million to $8 million, potentially Cruise’s weakest domestic debut since Lions for La