Best surprise, for a rock concert.....

My favorite concert was Metallic 1988 at the Philly Spectrum. 2nd row center stage seats. Until the seats got tore down. I didn't participate but the Cult opened and got boo-ed offstage along with flying chairs. Metallica put on a kickass show.

Metallica several times w/ Motorhead, Metalchurch
ZZ top
Crue