27.
Roommate's ex abandons their vehicle in front of my house.
I tell them to please move it or I will have it towed.
Vehicle suddenly has two flat tires.
Ex files police report claiming my roommate and I had slashed their tires.
Waited until ex made their statement to the police about how we had slashed their tires and that is why they couldn't move his vehicle and filed a claim against us in small claims court.
Provided police and the court copies of my and our neighbors door cam footage showing the ex arriving in the middle of the night to slash their own tires.
cherry on top: Ex shows up in court wearing the same shirt as in the videos.
EDIT: Wow this blew up.
Roommate and ex had only been dating a few months. Ex turned out to be a grifter and was dating several people at the same time and using each of them for food, shelter, money, etc. I got involved when my roommate was out of town and the soon-to-be-ex just sauntered in (apparently they had learned the code to the garage door), made themselves a sandwich, showered, slept, etc. I thought my roommate had come home early but when I texted them they were still out of state. The ex left to go out and I changed the garage code.
The vehicle wouldn't start so they just left it there thinking it would be okay. Roommate and a few of the other people the ex was dating find out about each other and they all dump them at once. I ask the ex to please move their car or I will have it towed. I give them two weeks.
Later on I learned that the ex was having a mental breakdown and they made some very poor decisions at that point. They broke into some of the other people's houses when they weren't home to do laundry, eat, sleep, and did some other things that got them in trouble with the law but are irrelevant to this story.
The ex had no proof that anyone had slashed their tires. The cops just came to the door of me and our neighbors to see if there was any footage - there was and they closed the case, I guess, they never talked to me again about it.
The court case was small claims court. The plaintiff has to pay a fee, file a form, have a summons issued to the defendant and then you both show up in court with your evidence. The ex had no evidence other than a long list of real and perceived grievances with my roommate but no actual proof so the judge dismissed the case. I never got to show the video evidence to the judge but I did share it with the clerk on their lunch break and they were the one who pointed out that the ex was wearing the same shirt.