A allegedly drunk professor forced students to sit through a 23-hour oral exam at Kazan University in central Russia. The professor, who students said "stank of alcohol" would leave the room to drink, then return to harangue the class from 10:00 a.m. on June 26 to 9:00 a.m. on June 27, according to RIA Novosti, the Russian News and Information Agency.

The professor, Landysh Zaripova, reportedly began the exam in a normal way. End-of-semester exams in Russia are given orally and often do not follow a set timeline, but as the exam wore on, students said, Zaripova began to act more erratically.

“The lecturer would go into another room, drink, come back and start telling us about her business," one student told the newspaper, Moskovsky Komsomolets, "Towards the end, everyone was just sitting there, totally exhausted."

Students are required to answer exam questions to their professors' satisfaction to graduate in Russia. Zaripova's boss, head of the Kazan University's physics department, Albert Aganov, insisted that long examinations are not uncommon and that the professor was not intoxicated.

“I would have fired her immediately if I had seen her drunk," he said.

RIA Novosti reports that alcohol abuse in Russia is a serious problem, with the average Russian consuming four gallons of pure alcohol per year. While annual deaths of acute alcohol poisoning in the U.S. average around 300, in the former Soviet Union, the numbers each year are in the tens of thousands.

Zaripova refused to comment to RIA Novosti.