anthony james
Carmelo Anthony (No. 7) of the New York Knicks and LeBron James (No. 23) of the Cleveland Cavaliers fight for position in the first quarter at Madison Square Garden on Dec. 7, 2016, in New York City. Elsa/Getty Images

It's a great time to be involved with the NBA: massive TV revenue has allowed for massive new player contracts while owners have seen the values of their respective franchises skyrocket. With all that money at stake, it's not a huge surprise the NBA Players Association and the league were able to agree to the terms of a new collective bargaining agreement (CBA) last week.

Either side could still opt out this summer in a move that would almost certainly trigger a lockout, but it looks like under the new deal the NBA won't have a work stoppage for some seven years. Reports indicated that the CBA looks a lot like the old CBA. There's still a 50-50 split of the money between players and the owners, and just minor changes in the salary-cap and luxury-tax rules, Yahoo's Adrian Wojnarowski reported. Players' salaries are expected to continue their dramatic rise in value, retirement benefits are expected to improve and teams will now have the ability to offer large, extra-lucrative contract extensions to their so-called "franchise players."

Those are the big points of shifts to come, but some smaller changes were noted this week by the website Basketball Insiders and elaborated on by Deadspin. The CBA laid out a number of "prohibited activities," which effectively amount to things players do that worry teams. The activities set to be banned include "fireworks, firearms, jet skiing, hoverboards, [and] trampoline jumping" according to Basketball Insiders.

These rules might seem like an odd policing of fun on the part of the league, but some of these activities can prove pretty dangerous. The NFL's Jason Pierre-Paul nearly ended his career after a fireworks accident that severely mangled his hand. There are some 33,000 gun deaths per year in America. Dozens of people die per year on personal watercraft like jet skis, according to Coast Guard statistics. Hoverboards, falling issues aside, have a habit of exploding into flames. A 2014 study showed, meanwhile, that trampolines caused nearly 300,000 broken bones and $1 billion in emergency rooms visits over a decade.

As Deadspin noted, the prohibited activities are not anything new, a sample 2010 contract banning everything from mountain climbing, to hang-gliding, to racing any motorized vehicle, to boxing, to playing an exhibition game of any sport, or even riding a moped.

Everything in the new CBA is subject to change because the agreement remains tentative, but right now it looks like the players might have to save the hoverboarding for retirement. That might prove to be a bummer, but with the average salary rising to an expected $10 million per-year by 2020, it's likely a sacrifice most players are willing to make.