I think every one of us has either a horror story or a funny story on taking the CRR or FCRR, and it sure would be fun to share!
I'll start. I flew to Nevada to take the CRR test several years ago, and I believe due to the difference in temps flying/landing, two of my key pads on my writer ended up sticking together! My untran rate was something like 10.5, on what was a really good test! I was mortified and couldn't figure out what the heck happened until I went back to the hotel room and closely examined my writer and discovered that every time I pushed one key the one below would depress also. What a waste of a good test and a lot of money!