Look around you and what do you see? Our world that we see everyday. For most of us it's not that exciting. But there is another world that we can't see. One that can be very exciting. One where the laws are different from our world. In that world transformations are a normal part of life.
There is a barrier that separates the two worlds but cracks do appear in it. For the most part these cracks are short lived and people and animals rarely slip through these cracks though it does happen. However on occasion the cracks last for upwards of two hours giving people and animals a greater opportunity to slip through them. The cracks allow for two way travel between both worlds. The cracks are of course invisible so one could be right in front of someone and they wouldn't know it. When someone goes through a crack they tend to feel like they missed a step at the least and may black out at the most. The cracks can be vertical or horizontal so someone can either walk through a crack or fall through it.
In the unseen world no one truly dies. If their body stays more or less intact they'll be transformed into something else and if their body is completely destroyed they'll be transferred into something else. This goes for those that enter the unseen world as well as those that live there.
Now you're about to slip through one of these cracks into the unseen world. First though what is you name, age, and sex?