Worst thing found in a porta potty during holiday season?

Nine years driving a vacuum truck around Akron, and holiday season always brings surprises. Last week, serviced a cluster of standard units at a Christmas market. About 500 people over a weekend, lots of hot cocoa and mulled wine. Ground was frozen solid, truck access was fine. Pulled the first unit, found a full-size ceramic Christmas tree ornament sitting right on top of the tank contents. Not broken, just... there. How does that even happen? Anyone else find something festive and utterly baffling in a holding tank this time of year? What's the weirdest holiday item you've fished out?