Curly? (Random?) transformations

I got my hair cut yesterday and under the top layer of my long hair and with the length taken off, aghast I have curly hair. Not super super curly but wavy bordering on curly in the back. How does something like this happen. What does it mean? Twenty seven years of stick straight hair and suddenly curls? Is this the manifestation of the events of the past year? Or, a sign of things to come? Or, just a random transformation.