haha don't worry, my old horse almost put a hoof through the judges car the first time I took him out :S Then he just about did the whole test backwards. He absolutely refused to go forwards unless someone was literally dragging him along!
And as for Carleens comment about judges marking some horses/riders down. SO TRUE!! It probably doesn't happen so much in PC dressage, but I know that in official it happens all the time. Prelim is basically a lottery, take your ticket and hope for the best because just about anyone can win it.
If you're a big name with a snazzy horse, even if you do a shocker of a test, you'll generally get a few extra marks over your paper just because of who you are. At some competitions, I split the class into two divisions. Div 1 and Div 2. Div one is comprised of the people who have big names, plenty of $$ and super expensive horses that have been trained by someone else and they just sit on them. Then div 2 is the rest of us, who don't have much cash to spare, we make do with what horses we can get and work our butts off to get where we are. If you third behind two 'div 1' riders, I class that as a win :P
My proudest moment in dressage though was beating the 'queen' of 'div 1' riders at a championship event last year... my status immediately rose and people that used to turn their nose at me started talking to me haha!
Dressage is so fickle, but we still love it :P