As if struck by the adamantine sword of the Scorpion King, THE ROCK of ages is cleft for me. On one side, he's the indefatigably charismatic World Wrestling Federation superstar, a cocky, trash-talking fictional construct who punctuates baroque WWF story lines with the most famous physiognomic gesture in the history of sports entertainment--a vaulting eyebrow hoisted high above a gimlet stare. The Rock is the People's Champion, who employs something called the People's Elbow as his coup de grace.
On the other side, he's Dwayne Johnson, an amiable and quietly articulate young man with a chiseled physique. A mensch with...