luckily nothing like this happen to me when i had my own bus mix-up in cambodia...

Thailand: Missing 25 Years After Taking Wrong Bus

Jaeyaena Beuraheng, a 76-year-old woman from Malaysia, has been reunited with her family 25 years after she got on the wrong bus, local reports said. Ms. Jaeyaena, who cannot speak, read or write Thai and speaks only Yawi, a dialect also spoken by Muslims in southern Thailand, where she was bound, ended up in Bangkok, 750 miles north. She boarded another bus, thinking she was heading south, only to end up in Chiang Mai, farther north. She eked out a living as a beggar for five years before being arrested in 1987 and put into a homeless center. She was thought to be mute, until last month when three students from her province came to work at the center and spoke her language.