Starting to drop my 100 pace

Today throughout whatever set we were doing my 100 pace was lower than normal. even during a set of
100 Free
50 Stroke
100 free
50 Stoke
100 Free
50 Stroke
100 free

The free was on a 1:45 and I held about a 1:38 pace on that even though it was at 75% of the way through the workout.

I'm really happy with it. It seems like I'm having to think less to keep everything together too. I'm able to think aobut some other things like my hips instead of just my hand position. i'm excited maybe i will be able to swim a 1;10 IM!