A sky lantern with the burning solid fuel and a small lit firework attached to give it an extra boost halfway during the flight.
{"Image Software": "Google", "Image YCbCrSubSampling": "[2, 2]", "Image ExifOffset": "58", "EXIF ExifVersion": "0220", "EXIF ExifImageWidth": "492", "EXIF ExifImageLength": "640"}