If you've ever hopped out of an Uber one item lighter than you were when you jumped in, you're not alone. By now, we all know what that feels like, whether it be a cell phone, a hat or scarf, or even an entire handbag. But, according to Uber's Lost & Found list, there are some riders who've left behind some pretty questionable objects — like butcher knives, marriage certificates, and whole slices of pizza.

Uber just released its Lost & Found data from 2017, and the list finds that — on top of the fact that app users leave things behind in their drivers' cars surprisingly often — many riders have left behind some pretty wacky things too. The item most frequently left behind by U.S. Uber riders are cell phones (no surprise there), followed by wallets, keys, and clothing, respectively. That all sounds pretty normal, but there are so many questions to be asked about the person who left behind an actual butcher knife, according to the data. What was that person planning on doing with said butcher knife? And did they ever get it back? These are things we NEED to know.

Also featured on Uber's list of outrageous forgotten items is an emoji lunch box, a Burger King visor, divorce papers, a box of hair extensions, a nuggets and fries meal, a gold grill with diamonds, and "my brother," whom we're hoping found his way back home ... eventually.

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getty images

Uber also included a list of the most forgetful cities, and can you guess who topped the list? New York City came in at No. 1, which isn't so surprising, given how fast-paced the city is. Following right behind are Los Angeles, San Francisco, Chicago, and Miami. Essentially, people lose things the most in major cities, but that's probably because there are more people there to lose said things.

Hopefully we can use this as a reminder to grab our things, so no one else has to deal with the heartbreak of leaving an entire slice of pizza in an Uber. (Which also happened.) Now that's a tragedy.

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