Why do you think there are so many sayings referring to foxes? Crazy like a fox. Sly as a fox.
I was walking in the woods once & came upon a red fox kit. We surprised each other! I was only about 6' from it when we noticed each other. We both froze & we both stared. We must have stood there for 10 full seconds before it took off & I decided to continue on. It was one of those "moments" in life.