Background When Michael Akroyd presented the Gypsy AntiPattern at Object World West in 1996, he likened the transient appearance and then discrete vanishing of the gypsy class to a "Gypsy Wagon" that is there one day and gone the next. As we studied Akroyd's model, we wanted to convey more of the Gypsy's invoking function in the overall AntiPattern name. Thus, we felt that since poltergeists represent "restless ghosts" that cause "bump-in-the-night...