Boise, Idaho-born performance/visual artist Jessie Proksa doesn’t actually begin nor end her 40-minute solo excursion within Undergound Uptown’s miniscule, item-strewn performance area. Sitting in a corner, playing a repetitive melody on her cello, Proksa indicates she is warming up. Eventually she begins interacting with the items surrounding her—a music stand, beach umbrella, seashell (doubling as a phone), three chairs, an audio-visual setup, a mandolin leaning against the wall, assorted wads of...