Phaser, continuous fire by peridactyloptrix
http://freesound.org/people/peridactyloptrix/sounds/216909/
http://creativecommons.org/publicdomain/zero/1.0/

Warning.ogg by Serithi
http://freesound.org/people/Serithi/sounds/150326/
http://creativecommons.org/licenses/by/3.0/