The distance between the basketball floor and the thin rubber sheet protecting the hockey ice beneath it in Cleveland’s main indoor professional sports venue is around 10 inches, or almost two iPhones’ worth.

At Rocket Mortgage Fieldhouse, which debuted in October 1994, players, coaches, and fans shell out thousands of dollars for courtside seats, which end with chairs that are deep below the playing floor, every night of an NBA game.

“Just coming in and out of the huddles (during timeouts) is tricky for me,” Los Angeles Lakers coach Darvin Ham said about the experience of coaching on the slightly elevated court in Cleveland. “I’ve got big feet, so hopefully I don’t faceplant.”

That ungainly, 10-inch fall from the court to the floor underneath it produced nothing noteworthy for more than 1,200 regular-season games—including all those LeBron James-driven playoff runs. Up until Wednesday of last week.

Heat player Dru Smith leaped while playing defense, landed out of bounds, and his foot, maybe slipping on a piece of paper with first-quarter data scribbled on it, slipped over the edge in the second quarter of the Miami Heat’s otherwise forgettable rout of the Cavaliers. His right ACL suffered a serious injury that ended the season as a result of his knee giving way. Erik Spoelstra, the Miami coach, later described the Cleveland court as “dangerous.”

“Maybe this is something that can be addressed with the league moving forward,” Spoelstra told reporters Friday in New York, after Smith’s injury was confirmed to be season ending. “I doubt anything will change with the floor. It is a hazard in our mind and probably in a lot of other teams’ minds, too.”

According to a Miami official, the Heat voiced their concerns about the Cleveland floor to the NBA league office. After the injury on Wednesday, Spoelstra said—and several NBA sources concurred—that no other court in the NBA has a drop like that.

Disney on Ice is located in Cleveland at the Rocket Mortgage Fieldhouse, home of minor league hockey. The only obvious solution at this point would be to replace the substantial wood blocks that are currently separating the court from the ice.

The Lakers, who took on the Cavaliers on Saturday night, were the first team to visit Cleveland following Smith’s injury. During their morning walkthrough, the team discussed the event.

James, who spent in 11 seasons in Cleveland, said Smith’s injury was “unfortunate,” and when asked if he agreed with Spoelstra and the Heat about addressing safety concerns with the floor, he told The Athletic: “Yes, the league should look at it. They should address it.”

“It’s something that definitely needs to be looked at,” Ham said. “Any time … you have a situation where someone’s getting hurt and the potential to get hurt, and in this particular case it’s the floor, I think they need to take a look at it and see if there are ways things could be better.”

“It’s a little scary, to be honest,” Los Angeles guard Austin Reaves said.

The courts at several locations used for the NCAA Final Four are noticeably higher than the Cleveland court. Playing on a court around three feet above the arena floor, Cavaliers coach J.B. Bickerstaff spent two years as an NCAA player at Minnesota. “I could see how opponents who aren’t used to it could see it as a distraction,” Bickerstaff said.

“Our guys are comfortable playing here,” Bickerstaff said. “We haven’t had any incidents (among Cleveland players) because of how our floor is built.”

Not only have these been the home court conditions for the Cavaliers for the past thirty years, but many who recall the team’s previous location, the Coliseum, a suburb between Cleveland and Akron, also claim that the floor there was elevated because there was hockey ice underneath it.