Cirque Imagination, an assortment of more than 25 former Cirque du Soleil performers, has never shown any respect for gravity. Don't expect them to start now. The troupe has been touring its show, MONTAGE, since June 2008 and adds Atlanta to the list of cities left memorized. Whoever told you people can't fly lied. Come see for yourself. Through May 31. $19-$100. Fri.-Sat., 8 p.m.; Sun., 2 p.m. Cobb Energy Performing Arts Centre, 2800 Cobb Galleria Parkway. 770-916-2800. www.cobbenergycentre.com.