Skid Row were one of the very last hair metal bands to hit the mainstream before grunge took over in the early '90s. While the band's self-titled debut employed standard pop-metal riffs and generic lyrics (albeit to great commercial success), 1991's Slave to the Grind and 1995's Subhuman Race broke away from the pop-metal mold with uncharacteristically hard, thrashy guitars and unique songwriting techniques. Though personal differences and changing trends would eventually tear the core…