[Gameplay] Out of bounds Present in Arcade.

[Own]

Two presents were in the bottom left corner, I think one pushed the other out of bounds. It was invisible for about a minute just launching bombs at me, until I move away for a while.. Then it emerged just that much as you see in the image, only then could I kill it.

 

[NicholasIV]

Had a random monster disappear shortly after entering, it still made sounds like the slime was hopin around and didn't require me to kill it for the room to finish (in the Frontline version 601)