Free theater in Central Park is one of my very favorite things, and this Friday Acting Against Cancer will bring a special Halloween treat to anyone who is excited to do the “Time Warp” again. AAC will present selected scenes and songs from the cult classic “Rocky Horror Picture Show.” Karter Louis will reprise his role as Dr. Frank-n-Furter, and the cast will be filled out by AAC regulars, including artistic directer Remy Sisk as Riff Raff. Since it’s Halloween, of course costumes are encouraged, and since it’s Rocky Horror, audience participation is nigh demanded. Admission is free, but AAC will be accepting donations to further their mission to help fund art therapy for Kosair Children’s Hospital. Halloween, free theater and the “Time Warp.” You’re welcome.