This happened at my job as a taxi driver last February. It was a VERY cold night, about -25 degrees celcius. This is important later. It was a Saturday night, and everything was usual enough. Most of the people were drunk and happy, some were going home from work, just the usual crowd really. Until this happened.
At around 1 am this maybe 50-years old lady got in my cab. She was pretty thin, and something about her appearance seemed a bit off. Not threatening or junkie-ish, but just a bit weird. I didn't really think anything of it at this point. She was dressed nicely, so I didn't even bother to ask if she had money even though her destination was about 40 km (~25 miles) away.
She told me that she had been out with some friends that she hadn't seen in a long time. She had had a good night. The usual cabbie-customer smalltalk. Pretty soon she started talking to herself. I didn't always hear what she was saying, so I would ask her to repeat herself. As I figured out that she's not talking to me, I just ignored her. At this point I started thinking that she may be on some drugs (prescription or otherwise).
We were well on our way, about halfway there when I asked her what exit does she want to take off the highway. It didn't really matter, one way was a few minutes faster and the other maybe 2 kilometers shorter, so it's just a question of preference. She told me to take the second one. Good enough. The shit hit the fan when we passed the first exit that we could've taken.
Me: "Ma'am, you told me to take the second exit. I can't turn around, since we're on a highway and there's a fence between the lanes. We can take the next exit just as well."
CL: "WHO THE FUCK DO YOU THINK YOU ARE? YOU DON'T HAVE A CLUE WHERE WE ARE DO YOU? TURN AROUND RIGHT NOW!!!"
Me: "No, I can not turn the car around here! We'll take the next exit, please stop yelling."
CL: <Some more yelling and all around shit-flipping>
And this is where this got really serious. She was sitting on the back seat, on the other side from me. She grabbed my right hand sleeve and pulled.
Luckily I had both hands on the steering wheel and didn't lose control, but I slammed on the brakes after checking that nobody is right behind me. I was done being polite by now. I turned around and told her in no uncertain terms that yelling and cursing is one thing, but touching me when I'm driving is another. I wasn't telling her to get out (-25 degrees, remember?), but I did tell her that if she does that again I'm throwing her out.
She apparently had had enough of my warm Mercedes, and decided to leave on her own. In the middle of the highway, at 1 am, on foot.
As soon as she got out I locked the doors, put on the emergency blinker and called the cops. I told them what happened and where I am, and started driving about 10 meters behind the lady as she started walking. Funnily enough, she walked the way where I was driving, so she didn't even turn around to walk the way she wanted to go so bad...
At one point she realized it's freezing out there, and came by the door and gestured me to let her in. I opened the window just a bit, and told her that she's not coming in my car again and that I've called the cops. She asked me to at least let her have her hat and gloves. I checked the back seat, and sure enough they were there. I threw them out of the window for her so she wouldn't freeze to death while we wait for the cops.
After maybe 15 minutes of me frantically flashing my brakelights to passing vehicles to warn them of 1) me driving walking speed on the highway and 2) this crazy lady actually WALKING on the highway, we got to the second ramp that we were supposed to take.
When we were on top of the ramp the police arrived. Not just one patrol either, but three! Slow night for them I guess.
When the police talked to her she seemed genuinely remorseful and lucid. I was actually thinking that the cops think that I'm the bad guy here, since she put on the act so well. I told them that ten minutes ago she was completely different.
She agreed to pay me for the whole trip, and asked me if I would take her the rest of the way. I told her no, and she totally understood and apologized some more. The police told her that they could take her home.
After she had paid me (by credit card, so the officer didn't actually see if the payment went through), the officer asked me if everything was good and paid for. I told him yes.
And now she went batshit insane again. She started yelling at the officer for asking such mundane questions.
"OF COURSE THE PAYMENT WENT THROUGH! YOU THINK I DON'T HAVE ANY MONEY?!" etc.
All around berating and cursing. The cop tried to calm her down, but in protest she threw her wallet with full force into the dark forest with a meter of untouched snow laying there. The officer told her that she wouldn't be going home tonight and escorted her to the patrol car.
I'm guessing the poor guys went searching for her wallet in the snow after I thanked them and went on my way.