As it turns out, Otto Porter Jr. of the Chicago Bulls was being drug-tested as the referees were reviewing the final play in their game against the Philadelphia 76ers.

Per Darnell Mayberry of The Athletic, Bulls head coach Jim Boylen confessed that it's his first time to take part in a controversial finish like that. He also added that Porter was taking a drug test that's why he wasn't on the floor.

In the final play of the game with 0.5 seconds left, the 76ers had a chance to snatch the game away from the Bulls. However, they weren't able to convert on the drawn up lob play. Players on both teams both headed to the bench. Zach LaVine, who finished with 39 points, even gave a post-game interview thinking that the game was already sealed.

But after a thorough review by the referees, it turns out that the clock started ticking even though no one made contact with the ball. The officials then called back all players back to the court to redo the play. Porter Jr. — who was part of the initial play — had to be subbed out as he was taking a drug test. Per K.C. Johnson of the Chicago Tribune, Porter Jr. shared that he was about to come back but the final buzzer had already sounded. So he decided to just finish the drug test.