Brap: Back & Forth Series 3 & 4 is a compilation album by industrial band Skinny Puppy. It was released as a double-CD in 1996. This album reached to #9 in Billboard chart's Top Heatseekers. Disc one is largely instrumental demos (only two tracks feature vocals and a few others vocal samples) whereas Disc two is composed mainly of live cuts (with only two or three studio tracks). The cover art was created by Dave McKean. This pioneering double-CD also included Enhanced CD content including a 3D style VR interface based on the Too Dark Park album and a virtual walk through the eerie art of the Spasmolytic single.