My son's first concert was Nickelback. Truth be told, they put on a hell of a show, but still ... Nickelback.
To make it up to him, I've since brought him to multiple metal shows (the stuff he likes: White Chapel, Slipknot, Slayer and many others), as well as Paul McCartney and Rush (on their R:40 Tour).
I will never stop feeling bad for him. In 20 years, when someone asks him what his first concert was, he will still get his balls busted. The only saving grace was that Bush opened up for them, but still .... Nickelback. Poor bastard.