Idk who it is, but if you pause the original Korean version of Growl at exactly 1:11 when the light is flashing behind them and look in the far right corner of the windows behind them, you will see a man staring at them with a water bottle sitting in front of him. Idk if anyone else has seen this, but I thought I would share this little surprise with everyone. I will add a link to thepicture of it to this post in a few minutes. Enjoy finding him!

click here to see a picture