Shake the orange juice, the Jack and the peach schnapps in a shaker 3/4 full with ice cubes. When it's chilled, strain into the highball glass and drizzle some of the blue Curacao liqueur over the top of it. Add a citrus twist (and, bizarrely, an olive if you're a DNA purist), sit back and be prepared to have your brain smashed out by gold bricks, lemons and allsorts.