The traditional blast beat is a single-stroke roll alternating between the snare drum and kick drum. The ride hand is usually playing in unison with the kick drum. The traditional blast beat is structurally very similar to the skank beat, which can be regarded as a predecessor and a half time variation of the traditional blast beat. The skank beat originated in the early punk and thrash metal scene as a drum beat for extreme music. The skank beat is similar to the blast beat as it alternates between the kick and the snare, with the difference that the ride hand plays notes in unison with both kick and snare. A skank beat is in other words a sped up 2/4 rock or polka beat. In the US the skank beat was early on also referred to as the "Slayer" or "thrash" beat due to its popularity among thrash metal bands such as Slayer.