Big Engine Opens for Atlanta Rhythm Section Tickets $40.00, $50.00 Day Of Show. SHOW TIME TBA Check out Thunder On The Rock on MySpace Or check out Thunder On The Mountain on the web. Would you like to go back stage and meet Tracy Lawrence? Atlanta Rhythm Section, & Big Engine? THOR announces their 2009 Rockin’ Back Stage Contest! The lucky winner will receive 2 Tickets to THOR 2009, as well as 2 Back Stage Passes for Friday, Saturday, & Sunday.