Scarlett Johansson plays Black Widow in the film, as she did in The Avengers and Iron Man 2, and the _'partially-lower-one's-middle-finger-to-wave-at-the-crowd'_ thing might be something that'll take off, or maybe it's more a Hollywood thing.
{"Image Make": "RICOH IMAGING COMPANY, LTD.", "Image Model": "PENTAX K-3", "Image Software": "Adobe Photoshop Elements 5.0 (20060914.r.77)  Windows", "Image DateTime": "2014:03:20 22:38:41", "Image YCbCrPositioning": "Co-sited", "Image ExifOffset": "608", "GPS GPSVersionID": "[2, 3, 0, 0]", "Image GPSInfo": "1022", "Image SensitivityType": "Standard Output Sensitivity", "Image Tag 0x8831": "1600", "Image PrintIM": "[80, 114, 105, 110, 116, 73, 77, 0, 48, 51, 48, 48, 0, 0, 33, 0, 1, 0, 22, 0, ... ]", "EXIF ExposureTime": "1/250", "EXIF FNumber": "5", "EXIF ExposureProgram": "Aperture Priority", "EXIF ISOSpeedRatings": "1600", "EXIF ExifVersion": "0230", "EXIF DateTimeOriginal": "2014:03:20 18:02:34", "EXIF DateTimeDigitized": "2014:03:20 18:02:34", "EXIF ComponentsConfiguration": "YCbCr", "EXIF ExposureBiasValue": "-17/10", "EXIF MeteringMode": "CenterWeightedAverage", "EXIF Flash": "Flash did not fire, compulsory flash mode", "EXIF FocalLength": "200", "EXIF FlashPixVersion": "0100", "EXIF ColorSpace": "sRGB", "EXIF ExifImageWidth": "4542", "EXIF ExifImageLength": "3028", "EXIF SensingMethod": "One-chip color area", "EXIF FileSource": "Digital Camera", "EXIF SceneType": "Directly Photographed", "EXIF CustomRendered": "Normal", "EXIF ExposureMode": "Manual Exposure", "EXIF WhiteBalance": "Manual", "EXIF FocalLengthIn35mmFilm": "300", "EXIF SceneCaptureType": "Standard", "EXIF Contrast": "Normal", "EXIF Saturation": "Normal", "EXIF Sharpness": "Normal", "EXIF SubjectDistanceRange": "3"}