Review: Bummer, Spank EP

File under “scary as fuck.” That’s one way to classify Bummer’s newest EP, Spank, and it’s pretty accurate. If the Olathe trio’s goal was to prove just how mercilessly loud and savage it could be, then Spank chalks up the chilling victory over just six songs. (Two of those — album opener “Estocada” and “Infinite Witches” — are reprised from its fall 2013 EP, Milk.)

“Estocada” sets the tone for Spank‘s subsequent 18 minutes with a bone-rattling bass line and lead singer Matt Perrin’s harsh shout. “Bad News” gives you only a few seconds to catch your breath before the guitar riffs snarl into math-rock territory, and “Dude Baby” buries its rancorous chorus in an earthquake of sludge and noise.

These aren’t drawbacks. Inside all this seemingly unfiltered rage, Bummer demonstrates remarkable discipline. Drummer Sam Hutchinson builds a steady racket on “Double Stairway to Heaven,” nailing down the track even as Perrin’s tetchy chords threaten to rip out the foundation. Bassist Mike Gustafson keeps the closer “Dorm Water” from flying off the rails with a gloomy, menacing pulse. If the calculated fury on Spank doesn’t terrify you, you’re not playing it loudly enough.