Jack Quaid’s action-comedy “Novocaine” topped a painfully slow weekend at the box office with $8.7 million. For theater owners, however, there’s not too much to celebrate: It’s one of the worst debuts to still capture the No.

Quaid's leading role in Novocaine feels like a natural continuation of these genre-bent everymen. He plays Nathan Caine, a mild-mannered assistant bank manager who has congenital insensitivity to pain with anhidrosis (CIPA), a genetic disorder that impacts his nervous system to the point that he can't feel pain or temperature.

Novocaine could have been written by a 12-year-old, and I’m not sure I mean that pejoratively. It’s a riff on superhero stories, but it’s been thought up with a whiff of dopey plausibility: The film’s protagonist,