A woman passenger travelling on an express bus from Grik, Perak, to Terengganu left her underwear stuffed between the seats, leaving the driver to surmise that she must have been "very busy" during the journey, reported Sinar Harian.
The irate driver, who refused to be named, took to social media to chastise her conduct.
He claimed he had felt anxious throughout the journey and that "the mystery was finally solved when I found the 'treasure' on my bus".
"I was concentrating on the road to ensure the passengers' safety, but she took the opportunity to start her 'business' at the back and left her underwear behind."
The driver said he was not trying to insult her but if anything had happened during the journey, he would have been blamed.