Post-punk aficionados may already by familiar with Crash Course In Science, a Philadelphia-based band who released two acclaimed singles between 1979 and '81, before going their separate ways. Here, one of the band's previously unheard 1981 demos gets mixed and released for the first time. "Jump Over Barrels" is a song about overcoming adversity, and in newly mixed form sounds like a lost post-punk classic. It's accompanied by a couple of demos - their initial 1981 recording, and an earlier, deliciously skeletal and heavy rehearsal version - and a fresh remix from Tadd Mullinix under his now familiar Charles Manier alias. The Ann Arbor-based producer does a good job of toughening up the track for modern dancefloors, whilst retaining the free-spirited essence of Crash Course In Science's original.