Not sure if this is even worth your time, but figured I'd let you know about it.
If the rat is in the red spot, you will be placed in the blue spot. That's a death sentence for many builds at that point in the game. If it were an actual vent, you'd get the message "something is blocking your path" or whatever.
That's in the dungeon you go to get the plasma sentry disabler thing for myles.
