Maybe you like playing in Game Arenas such as Amazone or TimeZone. And I found this vulnerability in those game arenas.
Different from the article before, this vulnerability may only be found in some game centers of TImeZone / Amazone (Not all vulnerable to this).
When Lebaran Holiday came, my mother suggested my grandma to go to Bandung and Puncak then asked all of my relatives to join us. On the 3rd day of our trip, we arrived in Puncak and go to one factory outlet that is called Brasco or Kampoeng Brasco. I only went there with my aunties, uncle and cousins.
My aunties asked us (me and my cousin) to just wait in a game center called Space Zone. “It will only take a few minutes”, my aunties said. My uncle joined my aunties to buys T-shirts and other things. So, my cousin and I was there, alone.
Ok, so we go around without doing anything (because we had no coin at that time) and just have a chat together. We keep talking and walking until we found two basketball game machines.
When my cousins keep talking, I thought a brilliant idea (because I was fed up with that place). I asked my youngest cousin to push the ball that is inside the web or wall with his small finger and It works! The ball started to move from its place! Here’s the pic:

Okay so now it has been out from its place then, my cousin that really likes basketball take the ball and throw it. So, we have nothing to do (again). So, I asked my cousin to do the same thing that he had done before. So, it was my turn! I shoot it and yeah, we’ve nothing to do (again).
Then, a man with his child played that game. We just looked at them who played it happily 
They played that game for 2 times. After they had no coin anymore, without asking or did anything, my cousin pushed the wall that protects or keep the ball inside and they had one more chance to play it for free!
Wow! They just surprised then play together (without any thanks
() and when I asked to push the wall again, it didn’t work anymore. I think it’s all because he didn’t push the wall on the right time
.
Those vulnerabilities seem won’t work in all TimeZone (but it may work in other location of TimeZone). By the way, here’s the pic of my lovely cousin that helped a lot:

Thanks!
ymm0t