This threesome from Chicago offers up stellar guitar powerings, ample structural skill, and the kind of indie-guy rock vocals that don’t steal the show but rather feel like your best friend’s new band: familiar, earnest, and a little shy. Wait Outside often feels exploratory — there’s a wide range of textures and influences, from the surprisingly immediate sonic assault of “Escape the Red Giant” and its cascading guitars, to the more delicate “Sheets,” permeated by the spirits of kiwi legends Straitjacket Fits and Jean-Paul Sartre Experience. With its faintly African hi-life rhythms propelled by rock guitars and warbly indie-pop vocals, “Organisms” brings to mind Vampire Weekend, while “A Name” has a lush ebb and flow to it, sounding like something the best ‘80s college bands (think Sonic Youth, Hüsker Dü) once created. When all is said and heard, one comes to the conclusion these guys are unconsciously holding back, and that Caw! Caw! might eventually go on to win a Best Loud Band title. There’s distinctive power in the fantastically brawny “Escape …” and later in “Rotten Ghost” and “Work,” where sheets of blistering guitars fight each other to the finish. The end result of these tracks leaves the listener as breathless as a sucker punch.