3 walked into the bathroom while you were showering

I hummed softly to myself as I finished up my shower, rinsing the conditioner out of my hair. I was about to turn off the water when-

"BEWARE! FOR I AM THE BOX GHOST! TREMBLE BEFORE ME AND MY AWESOME POWERS OVER ALL THINGS CARDBOARD AND SQUARE… AND THE OCCASIONAL ROLL OF BUBBLEWRAP OF DOOOOM!"

I paused. Did… Did I just… I peered out of the shower, but no one was there. I turned off the water and grabbed my towel, wrapping it around myself as I climbed out. I looked around, but there wasn't anyone in sight.

Shrugging it off as my little brother trying to spook me- hehe, I made a punny- I walked up to the foggy mirror- which was the result of me forgetting to turn on the fan before I took my shower- and wiped some of the mist off.

"BEWARE!"

Screaming, I whipped my head around to face who had snuck up on me. My jaw dropped at the sight of the pudgy looking man- no, ghost- who was smirking evilly (or at least, trying) as he took in my expression.

"AHA!" he announced loudly, causing me to trip over nothing- yes, I'm clumsy like that- and fall flat on my butt. I wrapped the towel tighter around me so that he wouldn't see anything. "I HAVE MADE THE PUNY HUMAN TREMBLE!"

"No… way…" I whispered. "You're… the Box Ghost… right?" He beamed.

"SO YOU HAVE HEARD OF ME!" he said, laughing maliciously (or, again, trying to). I brought my hand up to my head. This isn't happening… I tried telling myself. I'm dreaming… or being delusional…

"Wait a second," I said before looking at the Box Ghost angrily. "DUDE! You may be, like, one of the coolest ghosts on the PLANET, but how does that give you the right to barge into my bathroom?!"

"Uh… Beware?" he tried. I glared at him while he gulped.

"I SHALL SIEZE TO HAUNT YOU HUMAN… BUT NOT BECAUSE I'M SCARED OF YOU!" He paused again before throwing his hands in the air, shouting one last "BEWARE!" He disappeared as he phased through my ceiling.

I watched him go, disbelief going through my mind.

"I…" I said, coming to a conclusion. "Am going insane."

And with that, I went back to my room to get dressed.