Weird brake pedal question


So anyway, yesterday I was backing up (out of my driveway @ low speed) and when I released the brake pedal, it felt like there waas a little "click" or hitch at the very top of the pedal travel. Almost like something was catching. I backed up a few more times and it kept doing it. I only notice it in reverse, though, not when going forward. It is not loud or jarring, just a little bit of a hitch, like something isn't quite releasing right away. You can feel it in the pedal, not necessarily hear it.
I have replaced the MC and pads and rotors all around (my pins and bolts are new as well as the anti-rattle clips). Just FYI....
Is this just a quirk? Anything to be worried about? Anyone ever have this experience. Should I see a doctor?
TIA
-Ed


It's not a grind or anything, but more like a hitch or a catch... like something near the pedal is binding, but only in reverse! I dunno....




