The follow-up EP, "Combat Dancin"', underpinned the sub-bass pressure of the bleep 'n' bass artists associated with Sheffield's Warp Records, such as LFO and Nightmares on Wax, with mid-tempo hip-hop-style breakbeats. It also brought the group to the attention of the rave community due to the track "Mr Kirk's Nightmare", which pivoted around the "Get Into Something" break (taken from the Isley Brothers) and a morbid vocal sample ("Mr Kirk? Your son is dead. He died of an overdose.") taken from the Bobby Susser, anti-drug hit "Once You Understand" by Think. 4hero were among the first proponents of what would become known as "drum and bass", which began to grow in profile via a series of releases on Reinforced. Another drum and bass figurehead, Goldie, met 4hero at a performance in London's Astoria. Marc and Dego went on to teach and collaborate with Goldie which then brought the sounds Goldie envisioned to life, forming the Rufige Cru and Metalheadz monikers.