“Hard to explain. I don’t know what to tell you.”

Al Horford was at a loss.

He had just fouled out of a game his Celtics lost 90-89, watching the final 8:14 from the bench. It was literally something he couldn’t remember doing.

“I don’t remember the last time I fouled out to be honest and never that early. I was very surprised.”

Horford was irate after his fifth foul call, the middle of three fouls called by referee Marc Davis in a two-minute span, with the final two coming four seconds apart.

It started with what appears to be a reasonable hooking call against Horford, who is trying to establish offensive post position and locks up Kelly Olynyk’s arm in a move that had Kevin Love smirking somewhere.

But then irony hit him in the gut with a right hook, as he got whistled for a defensive foul a minute later on what appeared to be the exact same move by Olynyk.

At first, Horford seemed to be looking to the ref expecting a turnover. Same call for the same play. But when that wasn’t the case, he was livid.

Horford picked up the final foul on the next play and stormed the bench. He is a stoic and reserved man on the floor, rarely flashing emotion. This was as heated as he gets, something his teammates rarely see.

“Nah, not as his teammate,” Kyrie Irving said when asked if he had seen Al that angry before. “I’m pretty sure Al’s been heated before. It all happens within the NBA game. It’s going to happen throughout the season. Obviously, he was upset. It’s part of the game. He’s a veteran, so I trust his conscience and his decision making. Obviously, it took him out of the game, but the game is going to be the game no matter what.”

It was clear they felt Horford was jobbed by the final foul calls, with Horford stating he disagreed with the calls.

“Umm, like I told you, I didn’t think there was anything there,” Horford said of the final foul. “Uh, yeah. That was tough.”

Horford was smart enough to not take a shot at the officials and empty a Tesla 3’s worth of mullah from his bank account.

“You can’t say anything so — you really can’t,” he said. “I need to be better. And move on from this and get ready for tomorrow. That’s the good thing about the league, we have another one tomorrow.”

When a reporter tried to get Kyrie’s opinion, it did not go well.