You Forgot This.

Researchers have found the world's oldest leather shoe, according to the Associated Press. Dated to be over 5,500 years old, the shoe was discovered in the mountains of Armenia in what archeologists believe to be the world's first bowling alley.

A researcher involved with the find said, "This is thrilling for many reasons, but mostly because we now know that the concept of rental shoes existed before recorded human history."

It is believed that the old shoe's owner left his footwear with the bowling alley staff as a deposit for a different pair of cowhide shoes specifically designed not to scratch the lanes. 

The discovery has led archeologists to understand that humans have been walking away with bowling shoes that don't belong to them since perhaps the beginning of time. 

Semi-related note: One time at the restaurant, a busser came up to me with a high heel. Explaining that he had found it at a table, he asked me to put it aside in lost and found.

Furrowing his brow, he asked, "How did she leave?" 

Then, smiling, he lifted himself up on the toes of his left foot, and walked away, shifting his weight to a lower right foot, then back up to his toes, and repeat.