A method, comprising: at a multifunction device with a display and a touch-sensitive surface: displaying a user interface on the display; while detecting a single finger contact on the touch-sensitive surface: detecting a first movement of the single finger contact that corresponds to a first portion of a first gesture on the touch-sensitive surface; performing a first responsive behavior within the user interface in accordance with the first portion of the first gesture; the method being characterized by the steps of: after detecting the first movement, detecting a second movement of the single finger contact on the touch-sensitive surface that corresponds to a second gesture that is different from the first gesture; performing a second responsive behavior within the user interface in response to the second gesture, wherein the second responsive behavior is different from the first responsive behavior; after detecting the second movement, detecting a third movement of the single finger contact on the touch-sensitive surface, wherein the third movement corresponds to a second portion of the first gesture; and, performing a third responsive behavior within the user interface in accordance with the second portion of the first gesture, wherein the third responsive behavior is different from the first responsive behavior. at a multifunction device with a display and a touch-sensitive surface: displaying a user interface on the display; while detecting a single finger contact on the touch-sensitive surface: detecting a first movement of the single finger contact that corresponds to a first portion of a first gesture on the touch-sensitive surface; performing a first responsive behavior within the user interface in accordance with the first portion of the first gesture; the method being characterized by the steps of: after detecting the first movement, detecting a second movement of the single finger contact on the touch-sensitive surface that corresponds to a second gesture that is different from the first gesture; performing a second responsive behavior within the user interface in response to the second gesture, wherein the second responsive behavior is different from the first responsive behavior; after detecting the second movement, detecting a third movement of the single finger contact on the touch-sensitive surface, wherein the third movement corresponds to a second portion of the first gesture; and, performing a third responsive behavior within the user interface in accordance with the second portion of the first gesture, wherein the third responsive behavior is different from the first responsive behavior. displaying a user interface on the display; while detecting a single finger contact on the touch-sensitive surface: detecting a first movement of the single finger contact that corresponds to a first portion of a first gesture on the touch-sensitive surface; performing a first responsive behavior within the user interface in accordance with the first portion of the first gesture; detecting a first movement of the single finger contact that corresponds to a first portion of a first gesture on the touch-sensitive surface; performing a first responsive behavior within the user interface in accordance with the first portion of the first gesture; the method being characterized by the steps of: after detecting the first movement, detecting a second movement of the single finger contact on the touch-sensitive surface that corresponds to a second gesture that is different from the first gesture; performing a second responsive behavior within the user interface in response to the second gesture, wherein the second responsive behavior is different from the first responsive behavior; after detecting the second movement, detecting a third movement of the single finger contact on the touch-sensitive surface, wherein the third movement corresponds to a second portion of the first gesture; and, performing a third responsive behavior within the user interface in accordance with the second portion of the first gesture, wherein the third responsive behavior is different from the first responsive behavior. after detecting the first movement, detecting a second movement of the single finger contact on the touch-sensitive surface that corresponds to a second gesture that is different from the first gesture; performing a second responsive behavior within the user interface in response to the second gesture, wherein the second responsive behavior is different from the first responsive behavior; after detecting the second movement, detecting a third movement of the single finger contact on the touch-sensitive surface, wherein the third movement corresponds to a second portion of the first gesture; and, performing a third responsive behavior within the user interface in accordance with the second portion of the first gesture, wherein the third responsive behavior is different from the first responsive behavior.