You know you're a Submachine addict when...

[The Kakama]

You look at a cylindrical dustbin and imagine it's an XYZ portal.

[Sublevel 114]

..when you
after walking on little hill for 15 years, SUDDENLY find WTF the well??? and the hatch??? and ground beton place with warning message on steel plate??? on the hill
and first thing you think about is "Yeah, now I know where Submachine Entrance is located..."

[The Abacus]

when your mind begins to formulate submachine ambiances from random noises

[The Kakama]

You have a friend called Elizabeth.

[Porkymaster]

..when you warped to The End in Minecraft (note: The End are take place in floating island in dark void)

[The Kakama]

You eat an onion with seven layers.

[Ancient Crystal]

when your mind begins to formulate submachine ambiances from random noises

The moment I read that I heard some form of construction work in the distance that vaugely resembled submachine ambients.....

[WorldisQuiet5256]

When you make a connection between Murtaugh Arm and Metal Gear Solid 2.

[Sublevel 114]

when you test your cat on teleportation skills.

[Porkymaster]

...when you sees a familiar device you believed were the dimension-traveling device.