Chicago-based psych-rock group Post Animal announced their debut album, When I Think Of You In A Castle, last month with a single called “Ralphie.” It was nimble and poppy, a sunny throwback to ’70s FM radio melodies, breezy enough to make its lyrical anachronisms—”Ooh, baby[…] Ooh, girl”—sound natural. But the sextet (touring as a five-piece now because founding member Joe Keery is off playing Steve Harrington in Stranger Things) have a sludgier streak too, even if they grin their way through it. “Gelatin Mode,” premiering above, retains the sharp melodic sensibilities of “Ralphie” but throws in a shitload of riffs and yelps and half-paced breakdowns, the sort of stuff that clearly grew out of basements and day-drinking sessions a half-century ago but still provides a shameless thrill now. Keery and bassist Dalton Allison trade verses, howling about getting “lifted on the darker stuff” before reaching a weird final hallucination: “Your mind, gelatin mode / Time to explode.”

“For this video, we wanted to test our physical limits, gunning for stunts no one has ever attempted before,” the band said in a statement. “We had no guidelines, no restrictions, just our minds, our bodies, and a camera. We have done away with ourselves. The nights grow short and the days linger. Prepare to abandon reason and have some fun as you venture into… gelatin mode “

Watch the ludicrous and wintry video at the top of the page. When I Think Of You In A Castle is out April 20 on Polyvinyl.

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