If you sit through the end credits of the upcoming "The Amazing Spider-Man 2" expect a surprise, though how pleasant it is may depend upon which country you're watching it in. Empire reports that at UK screenings of "The Amazing Spider-Man 2," a clip from rival studio Fox's "X-Men: Days Of Future Past" has made it onto the film's end credits as a 'stinger'. According to the report, the clip is a straight up scene from 'Days', NOT a specially crafted stinger like Marvel Studios routinely does for their films and which the first "The Amazing Spider-Man" did. The scene sees Mystique, Havok and Toad taking on William Stryker (Josh Helman) and his men.