He will be jumping off the roof of the Museum of Contemporary Art, 220 E. Chicago Ave. -- no other museum in town would let him -- during a photo shoot that will last from 11:30 a.m. to 5:30 p.m. Tuesday. It is not a performance. It is an opportunity for viewers to see works at the earliest stage of their development and perhaps even get into some of the color pictures. Skarbakka will speak about his photographs afterward.