LOS ANGELES, CA — Each year, Metro bus and train passengers leave behind a whopping 1,000 items — which then end up in the agency’s central lost and found office.

The Los Angeles Times reported that around 30% of those items are reunited with their owners.

Some of the more unusual things that have ended up in Metro’s lost and found include a prosthetic leg, musical instruments, 55-inch-screen TVs and large generators, according to the Times.

Sometimes the items are tiny — one time, a woman contacted Metro about a button that had popped off her daughter’s coat. Metro was able to return the button to its rightful owner, according to the Times.

“It was a very ornate button and that seems small to someone but not to the owner,” Vanessa Smith, executive officer of customer care for Metro told the Times.