Hermione.
There was something off about that day, I could feel it. The sky was blue and the grass was green but there was something strange in the air. Assuming a storm might be brewing, I sped up my stroll to the bathroom entrance to the Ministry of Magic.
Hurrying past muggles examining window displays, I made my way into down an alley and took a left turn. Where the was usually an open (and reasonably clear, since this part of London was unusually sketchy) sidewalk, was a large, blue... box.
Standing before me was a blue telephone box with the words "POLICE CALL BOX" stated at the top. The box looked worn and I must admit that I was afraid it might collapse right before me. I peered around either side of the box. Since it was so large and the sidewalk so small, there wasn't much room to get around it without stepping into the dangerous London street of speeding cars that came around this area. I paused for a moment, considering how likely it was for me to get hit by walking the street or if there was another way to work that morning
BANG!
My thoughts were interrupted with a loud noise. I quickly turned around to see a man running toward me, arms flailing.
"THE BOX!" he yelled, "GET IN THE BOX!"
I examined the box. looking down I found the door handle and tugged. No luck. I realized then that the man was running from something. Panicking, I pulled harder until a sort of light was shot at the door and it sprung open, triggering a yelp of surprise from me which I quickly felt embarrassed about and covered my mouth with my hands.
When the man reached me, he pulled me swiftly inside and shut the door all in one motion. Once inside the... well I think it was the box, it was much bigger on the inside, though...we sat and panted.
"What," I said between breaths, "just happened?"
"Not sure myself," he replied, "never seen anything like it before."
"Anything like what?"
"Not really certain. It was like a dark, cloaked thing. It floated and when it came it got very cold, then when I approached it I felt saddened, it felt like the happiness was being sucked out of me."
My eyes widened, I knew exactly what this was:
"A Dementor," I whispered.