Prompt: Write a short story about a man who discovers a magical portal

My name is John Peterson and I live in a small town in upstate New York. I’m a normal guy, working in a normal job and going to a normal school. That is, until I discovered a strange portal in my backyard.

It was afternoon and I was playing with my kids in the backyard. We were kicking a soccer ball around when I noticed a weird light shining from the ground. I walked over to investigate and saw a small door in the ground. I aimed the soccer ball at the door and hit it, opening it up.

Inside, I found a small room with a strange creature inside. It looked like a cross between a human and a snake, with red eyes and a long head. The creature said my name and then teleported me into another dimension.