Peter's parents suddenly appeared in his life, claiming to have been abducted by communists. He had learned to love his "parents" and even revealed to them his secret identity. They turned out to be robots invented by the Chameleon to infiltrate Peter's life, discover his connections to Spider-Man and then kill him. The robot that masqueraded as Peter's father Richard was perfectly willing to accomplish his task and kill Peter, but the Mary robot had learned to love Peter and saw him as good person. Richard turned into a vicious engine of destruction. Before Richard could finish Peter off, Mary killed him using an electric cable. In return she was killed by the Vulture who was conspiring with the Chameleon. An enraged Spider-Man completely pummeled the Vulture but was stopped by the cries of his dying "mother". She told Peter in her last moments that despite everything, she still loved him. Spider-Man vowed to track down the Chameleon and make him suffer, which he eventually did after fighting through many assassins sent by the communist. Peter ultimately spared an emotionally broken Chameleon and left him for the authorities.
Halloween costumes are costumes worn on or around Halloween, a festival which falls on October 31. An early reference to wearing costumes at Halloween comes from Scotland in 1585, but they may pre-date this. There are many references to the custom during the 18th and 19th centuries in the Celtic countries of Scotland, Ireland, Mann and Wales. It has been suggested that the custom comes from the Celtic festivals of Samhain and Calan Gaeaf, or from the practise of "souling" during the Christian observance of Allhallowtide. Wearing costumes and mumming has long been associated with festivals at other times of the year, such as on Christmas. Halloween costumes are traditionally based on frightening supernatural or folkloric beings. However, by the 1930s costumes based on characters in mass media such as film, literature, and radio were popular. Halloween costumes have tended to be worn mainly by young people, but since the mid-20th century they have been increasingly worn by adults also.