Dwayne Johnson takes aim at friend Kevin Hart during Comic-Con fan Q&A

Dwayne Johnson takes aim at friend Kevin Hart during Comic-Con fan Q&A (Richard Shotwell/AP)

Dwayne Johnson took aim at his friend and fellow actor Kevin Hart as he answered fan questions at Comic-Con.

The actor appeared on stage surrounded by billowing smoke and crackling electricity to promote his upcoming DC blockbuster Black Adam.