Write an English composition with the theme of my unforgettable trip, 100 to 200 words, and write it yourself, an English joke.

My unforgettable trip was to the public toilet in the Peak Park. The toilet is at the top of the park. The water supply for the toilet is from the mountain to the P spring. The toilet compartment is quite open, and the walls are only one meter high. When you squat and shit, the wall can cover your naked back and your penis. The excrement you excrete will not be seen by the man next door. After defecation, you don't need to flush the stool. All flushing is done automatically by the water flushing system. The principle of flushing system is to use lever to control the center of gravity of bucket. I think it must be the designer, because many users are too lazy to flush the toilet.