Spider-Man's exposure to the mutated spider venom induced a mutagenic, cerebellum-wide alteration of his engrams resulting in the ability to mentally control the flux of inter-atomic attraction (electrostatic force) between molecular boundary layers. This overcomes the outer electron shell's normal behavior of mutual repulsion with other outer electron shells and permits the tremendous potential for electron attraction to prevail. The mentally controlled sub-atomic particle responsible for this has yet to be identified. This ability to affect the attraction between surfaces is so far limited to Spider-Man's body (especially concentrated in his hands and feet) and another object, with an upper limit of several tons per finger. Limits to this ability seem to be psychosomatic, and the full nature of this ability has yet to be established. Spider-man utilizes this ability in his locomotion across New-York, but also has the ability to use it offensively, in a manner resembling the Mark of Kaine. Spider-Man rarely uses this ability though, due to its brutal and disfiguring effects. It also works differently, ripping off layers of skin and muscle, rather than burning it as Kaine does via the HCL secreted through his palms.
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.