What makes it the spark version
The shot has a cause and an effect. For the first three seconds the walker holds a small glowing spark near the lips, with white smoke rising behind. Around 3.5 to 5.5 seconds a hand goes up and the spark is flicked back over the shoulder. About a second later a blinding flash opens into the fireball. Other versions use other triggers, such as a thrown key or a finger snap; this one uses a flicked spark.
