It's really cool how their collaboration really started a whole new sub-genre of metal music. The egg shell cracks, drums, and matalic hitting sounds working as percussion, electric guitar and matalic scratches for base and melodies, Eggsman's OUTSTANDING soprano vocal performance, and Metal sonic working with robotic backing vocals. Truely pioneers in this specific field. The liquidy sound of the egg could be artistically executed in many ways. We'll just have to see how this genre evolves over time. This cover of the album is very iconic and I just got the limited edition vinyl!