In the dying seconds of the fourth quarter, Jeon committed a foul, prompting a visibly furious Yoo Jae-hak to swear out loud on camera.

Fortunately, Seoul SK Knights' Aaron Haynes missed the free throw and Ulsan won the game.

The next year on the exact same day, with Ulsan ahead by a point against Seoul Samsung Thunders, he conceded a foul during the last 2 seconds of the fourth quarter.

[3][4] The incident went viral among fans and netizens and the club started to sell Jeon's jerseys at a 17% discount on December 17 every year.

[5] Jeon applied to serve his mandatory military service with the Sangmu basketball team but was rejected.