Genre-defying Hypnotic Fist Technique is easily Cambodia’s most inventive band, and probably its most audacious (partly, but not entirely, owing to co-emcee Mike Dynamo’s spectacular collection of diamante-studded stage attire). Blending hip hop, rap and rock with a smattering of R&B and even Motown flavours, the five-piece started out jamming at open mics and experimenting…