The Eye Hookset

Today I was fishing a small pond during my lunch break.  A small bluegill took a swat at my fly but my hook set just nicked him.  The fish then goes bezerk.  He was flailing all over the place for a couple minutes and I have never seen a fish act like this.  I then saw this on the end of my fly.

First time I've ever hooked and gouged an eye off a fish and hopefully the last.