What does it mean?

We got to play the back nine at the Elks at practice yesterday, the first time that's happened all year. And, I played fairly well--to the point of two birdies. Now, my personal best for most birdies in a round is 2, and I've done that probably 5 or 6 times in my life. And three of those have been this year. Does that make sense? I'm playing like once, maybe twice a week, and when I do play it's usually in some form of competitive format with my team. I used to play five or six times a week, spending a lot of that time practicing and hitting shags. So, why does that mean I start getting all these birdies now? Especially in pairs--they were back-to-back yesterday. I don't think the courses are that much easier than what I used to play back home...so is this just a fluke? Or do I just need to get a life and stop worrying about such things? :)