Although Chain Reaction highlighted six installations by Boulder artist Gail Wagner, all six came together as a single, seamless work. Wagner’s specialty is forms made of crocheted rope that is dyed, painted and accented by tiny, sewn-on charms. Her preferred shape is a circular appendage that sometimes looks like a worm, sometimes like a tentacle, and sometimes like some unknown microscopic life form. Nevertheless, rather than being disgustingly visceral, the pieces were enchantingly visual.