Rarely and unpredictably, a performance will transcend music and become a living thing, a forceful creature that grabs the audience and won't let go until the piece ends; it then lingers for hours in the mind. These experiences transport me beyond what Gustav Mahler called "the sounds of a garrulous world" and overshadow the conductor and musicians - not because they're unimportant, but because the life-giving in their performance is so profound. On Saturday at the Adler Theatre, the beast arrived after intermission when the Quad City Symphony Orchestra and Music Director and Conductor Mark Russell Smith breathed life into Johannes Brahms' Symphony No. 1.