How can you physically stand behind your father while he is standing behind you?

Common Wrong Answers
“Stand on his shoulders”
If you are on his shoulders, you are not standing behind him, but rather above him.
“Face him and take a step back”
If you are facing him, you cannot be behind him; you would be in front of him.
“Lean against a wall while he faces away”
Leaning against a wall does not allow for both of you to be standing behind each other simultaneously.
Similar Riddles
Riddles you might also enjoy
We travelled the sea far and wide. At one time, two of my sailors were standing on opposite sides of the ship. One was looking wes...
How can you distribute three apples to two fathers and their two sons, giving a whole apple to each.
I am always in front and never behind. What am I?
Tom and his younger sister were fighting. Their mother was tired of the fighting and decided to punish them by making them stand o...