Yikes! Glad you have a good sense of humor about it
One thing to remember for next time - reduce the course to as few cones as possible - 75% or more of the cones are just noise, and you shouldn't be looking or thinking about them.
Perfect example of something that used to fog my mind - looking down a course you see a whole sequence of offset gates that blurs into a 'sea of cones'. What it really is is just an offset slalom - concentrate only on the cones that define the line. For me, I walk once or twice until I have the line down, then as I walk one more time, I stop and close my eyes for a sec and take a mental picture of the key cones being twice as bright, and all the other cones dimmed down to grey.
Good luck and have fun!