The Ministry of Home Affairs revealed on Friday evening that Professor Huang Jing, a U.S. citizen, as well as his wife, Shirley Yang Xiuping, will have to leave Singapore, after being identified as an agent of influence for a foreign country.

Both will have their permanent residency status in Singapore revoked.

If you have heard of Huang Jing prior to this though, either you are a part of, or know a good deal about, the Lee Kuan Yew School of Public Policy, or you are a connoisseur of public drama.

See, the professor was involved in a much smaller Singapore-centric drama back in June 2016.

$1 tip

The video below shows Huang Jing engaging in a heated debate with a cab driver.

The cause of dispute was apparently a $1 tip that the professor had given the cab driver.

According to a Stomp article, the professor had paid the driver $100 for a $21 cab fare.

And when the driver offered him the change, Huang Jing took just $78 out of the $79 the driver had passed to him.

Cool, that should have been the end of the story, but for some reason Huang Jing proceeded to scold the bewildered driver.

He allegedly demanded the driver to show him some respect, and went on to justify this by saying he has been a professor in Singapore for the past 8 years.

The driver eventually called the police.

The police established that a case of dispute had happened, but concluded that no further police assistance was required.

Here's the video:

Top image adapted from LKYSPP video