dddddddddddddddddddddddddddddd ddddddddddddddddddddddddddddddddd ddddddddddddddddddddddddddddddddddd ddddddddddddddddddddddddddd ddddddddddddddddddddddddd dddddddddddddddddddddddddddddddddddddddd dddddddddddddddddddddddddddddddddddddddd dddddddddddddddddddddddd aaaaaaaaaaaaaaaaaaaaaaaaaaa o! -and since laser had to defeat lava to make it to the finals, your favorite former-middle-school-teacher-turned-to-laser-wielding-mad-genius is back; science Bob Pflugfelder. -good luck, Mark. -you're so positive. and The provided text mentions a lava lamp and a CD (Rod Stewart's Greatest Hits) as objects used in the competition. The lava lamp was modified, and the CD was burned using a laser.