The fierce years

Last night, my son and I ventured to the playground after dark because he was very excited to show me how he now feels brave enough to jump off the playground equipment with a rope.  

It was a starry clear night, with just a smattering of snow on the ground, and as we walked I commented that we hadn't done that much sledding this year.  Thanks to a gentle winter mostly, I thought.

My son responded, "yeah, the years are getting fierce.  The wind is blowing so strong and people are making jumps these days.  When I was four, I got on a little sled and went down little hills, now it's getting fierce and I don't want to go sledding anymore."

I had no idea.