I have a thing against sharp edges and pointy things. With the use of the circular plastic top of a paint can which you can see in the below pictures, I cut circles and irregular small pieces along the way. I guess that's what creation is all about. There is no pre-planning. Just what feel right at the moment.
This is what I quickly put together.
Below is my friend's work with a circle from me. Told you, they all did pointy things.