https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=3313437599

I have been playing this map a lot but at some point on my night 3 I realized that in the extra camera that I had placed in the Main Room, a yellow foot was visible on the right side that does not belong to any of the 4 current animatronics ( And I don't think this is Springtrap, it hadn't even made its easter egg on this point). Does anyone know what it is and how to get it out again?