The shower curtain!

Quickly you grab hold of the plastic and pull with all your weight. One by one the rings that attach it to the pole above break off and soon the entire curtain falls off and covers you up nicely. Yes, this could work. The monster didn't go for the salt while it was still in the jar after all and it seems confused by this simple countermeasure.

With some effort you hurry to get out of the tub and wrap yourself in the curtain as tight as you can. The salt is starting to itch but if you can just get out of the bathroom you can deal with that later. Wrapped in the curtain you hop across the tiled floor towards the door.

To your amazement you reach the door and poke an arm out through your protective wrapping, fumbling and slipping with the doorknob for what seems like forever, until the door swings open and you fall out into your bedroom and fall out of the rolled up curtain. Immediately the tentacle beast turns your way, dozens of limbs flailing with excitement, but you kick the door shut and are rewarded by a series of squishy thuds as the beast slams into it.

The adrenaline is starting to wear off and you recognize the onset of shock creeping up on you. You haven't had much time to consider how incredible the whole episode had been, with a real-life tentacle monster as something out of a poorly concieved hentai story haunting you bathroom. It seemed too stupid and amazing to be true, but it was, and if it hadn't been for your quick thinking you would have lost much more than just your underwear.

As if to reward your efforts the lights in your bedroom flicker back on, blinding you. You rub your eyes which is a bad idea when you are covered with bathsalt. Stifling a scream as to not wake up the rest of your family you crawl over to your pile of laundry and use an old towel to wipe off as much of the salt as you can. It takes several minutes because the powder has become a sticky mess where it mixed with your sweat, tears or other bodily fluids, but finally you are clean.

Now, while your bedroom light is still on, you swing open your bathroom door! Just as you had come to expect the tentacle blob is nowhere to be seen. The only evidence of its existence is a puddle of black goo on the bottom of the bathtub which starts to smoke and bubble away, disappearing almost instantly.

You take a quick shower to get rid of the last of the salt before going back to bed. For some reason you aren't as surprised or shocked as you thought you would be. Deep down you have a feeling that this is what you were meant to do. It's as if you had trained your whole childhood to fight the monsters under your bed and now it is finally time to put your training to use. You wonder what strange happenings the rest of the night will bring but you don't worry because you feel confident that you can handle it, whatever it might be.