What does it take to hype up a crowd? There are different techniques, like the game of give-and-take, playing something strange out of left field, but this is not the place to discuss this subject. An easier tool might just be to play this record. “Cobra” from John Dahlback is his newest release out on Wall, an electro house track with an air raid siren to boot. The siren alone is a surefire way to get the audience excited, but the angry bassline is set up to keep their bodies rocking. It is available for purchase here on Beatport.