Local underground psychedelia legends Crevice present a Valentine’s Day freak out in conjunction with heavy Denim and Fl!ght Gallery, which will also feature an exhibit of ready-mades by local visual artist Beto Gonzales. Characterized by creative light projections, acid-rock meanderings, and audiences splayed on the floor, the freak out was a staple of the late-’60s-era British underground psychedelic movement, in which a Syd Barret-led group originally titled The Pink Floyd Sound rose to prominence. Fast-forward 30 years to Crevice. After creating the perfect headphone trip with a self-titled debut consisting of a single 70-minute track, the original three-piece’s live shows began to develop a theatricality that verged on performance art. The weirdness is still there — the tripped-out atmospheres, synth-washes, oscillators, theremin, and disembodied voices are now joined by violins, cellos, saxes, and flute. Free, 8:30pm, Fl!ght Gallery, 1906 S. Flores, (210) 872-2586.