Recently i was headed over a bridge in 5th gear. I got to the top and started the steep descent but my exit was halfway down the bridge. I pulled in the clutch and downshifted to neutral to coast through the exit but i couldn't shift out of neutral. The shifter just vibrated whenever i tried until i was only going around 20mph, then it allowed me to shift out. Is this normal, and a typical noob mistake? I had the clutch pulled in the entire time.