Jabberjaw’s “The Connie Shake” single works in strange contrasts, juxtaposing elements that are both unsettling and powerfully addictive. The first thing you notice about “The Connie Shake” is its circular motion, its sense of weaving a spiral towards a magnetic center riding upon a bouncy, carousel-esque beat. Flocks of blippy micro-samples flit around like summer gnats; all is well. But throughout the track, a group of shouting onlookers egg on some sinister act, and a synth imitates a police siren. It begs the question: why, exactly, is Connie shaking?