Co-written by and dedicated to Robert Downey Sr.'s second wife Laura Ernst, who suffered from amyotrophic lateral sclerosis (ALS), the same disease the character Floyd Gaylen has in the film.
When the water truck comes around the corner the image is reversed. The driver is on the right side of the cab and the license plate is seen as if you were looking in a mirror.
After Hugo changes from her pants into her shorts (right before crying in the truck) she is seen cleaning her first pool wearing pants again. After that she is back in her shorts.