Mechanic: It will start appearing in the lobby, which you can hear his ambience a little bit, but, in a few seconds, it will starting making an noise that alerts you that it is coming before it rushes to the middle of the current room. Once it reaches to the current room, it will start idling for a few seconds, before rebounding once, breaking the door when it is done rebounding. Then, it will go to a random spot in the current room, before exploding. Any hiding spot that is near its explosion will be destroyed.
C2a.