Most comedy just reflects the world. The Pajama Men—a duo from Chicago—make fast, tight fictions that imagine new realities. They rethink the world. A father and his angry daughter explore a haunted hotel. A horse wants to kill, but cannot bring himself to kill, his rider. Two old people walk through a park, verbally abusing each other like peevish teenagers. The Pajama Men have crazy discipline; these shape-shifters understand precisely how long an audience's attention will follow one idea before swooping into another with a smart, bizarre segue that'll make your head spin. As writers, actors, and comedians, the Pajama Men rule the school. (Annex Theatre, 1100 E Pike St, 800-838-3006. 8 pm, $18.)