11.   Amid the pandemonium, the three cute blond brothers pretended they were playing an ordinary rock concert.

12.   And he once thought of dropping thousands of Ping-Pong balls emblazoned with his corporate logo from a helicopter during a rock concert in Central Park.

13.   And every rock concert had a medical tent to deal with teenagers having a bad trip or other problems with drugs.

14.   And in California, neo-Nazi skinheads are appearing in greater numbers at rock concerts.

15.   Are tickets to that rock concert too expensive?

16.   As a result, the Mall between the Lincoln Memorial and the Washington Monument looked like a cross between an outdoor rock concert and a minimum-security prison.

17.   As a wave of ear-splitting summer movies arrives at theaters, ears ache or hiss or buzz the way they do after a rock concert.

18.   As each selection subsided, the crowd applauded as if it were hearing songs at a rock concert.

19.   As the competition wore on, he also became an audience favorite, generating raucous approval more typical of rock concerts.

20.   As he spoke at Staples Center in downtown Los Angeles, however, a nearby rock concert for convention protesters erupted into a violent confrontation.