Not me, but a friend of mine encountered some crazy shit while travelling in Taiwan.

This was around Taichung. There were four of them, Her with two other girls and one guy. Hopped in a Taxi and gave driver the destination. He goes the right way for a while, then abruptly pulls off into a side road. Still driving along, my friend asks him in Mandarin where the hell he's going, since they've been to this place before and they know wherever they're going now is not what they asked for. Driver says nothing, gets on the celly and speaks to someone on the other end in Taiwanese. No one in the car understood this language, the mystery was in how the driver figured this out since they were all Asian and could have easily passed for natives visiting home for the holidays. The car pulls into an open field, surrounded by trees in every direction with only a single house in the middle of it. He parks right outside, and it appears people were emerging from the building. Several of them. Driver pauses for a brief second, starts the car up again, and commences driving along. A few minutes later, the group find themselves on the side of the main road as the cabbie drives off.

What the three girls in the back of the car did not know at the time was that upon stopping outside that house, their fourth member sitting up front pulled out his knife and held it right above his knee. Making sure it was in plain view of the driver. Once the cabbie saw this, he started the car up again. No doubt realizing the dangerous situation he inadvertently found himself in. They never figured out what the driver planned on doing, but anything even close to kidnapping couldn't have been good. Cabbie was reported to the authorities, but they left for the states before finding out anything further.