According to the narrator who goes by the name @davidchibuike_ on Twitter, the incident had happened when he was in 200L.
The man had asked him, the narrator, for an answer in an exam which was being supervised by the man’s wife-to-be.
When she caught him, she collected his booklet and promptly gave him, the fiancé, a malpractice form to fill.
The narrator revealed that he was left completely shocked and when the man noticed his expression, he simply smiled, filled the form and left the hall.
See his narration below:
“When I was in 200L, a guy was being invigilated by his fiancée. When the guy asked me for an answer, she took his booklet and gave him malpractice form. I shock!!
The man looked at me and saw that I was shocked too. He smiled, filled the form and left.”