The tension in the Kardashian family has been rising in the past few seasons, and Thursday's premiere showed the bomb explode between Kourtney and Kim.

Sisters Kim and Kourtney got into an all-out brawl over comments made about work ethic. The episode ended with an ominous "to be continued ...," and they were in the midst of throwing, kicks, punches, and scratching each other just like an episode of Bad Girls Club. 

The family tweeted along with the premiere, and it seems like things have fizzled since filming the angry episode. They all had some witty comments to make about the brawl, and Kourtney shared that she's experienced plenty of growth since then.

The lead-up to the fight was Kim talking about her work ethic compared to her sisters'.

Kim went on about how she and Khloé would be there for her mom if she needed them, and that Kourtney and Kendall are less serious about working for the show. Jenner didn't appreciate the comment, and then Kourtney caught wind of the conversation and went totally off the handle. 

Kourtney and Kim started brawling and shouting expletives at each other.

Fists were thrown, nails scratched, and kicks were made.

The episode concluded with fists flying and kicks made toward each other. The two were so mean and hurtful it was uncomfortable to watch. Clearly, this fight had been brewing for some time.

Rob Kardashian called out his sisters for making the show a bad girls club.

Their younger brother tweeted, "my sisters forgot we were filming #KUWTK and thought it was bad girls club." These two did look like they were in a totally different show and got majorly toxic with this fight. Their relationship is strained, and hopefully things have been worked out since filming.

Kourtney Kardashian also made a few joking tweets about the feud.

"Kourtney 'the nail digger' Kardashian weighing in at 108 pounds...Kim 'the kicker' Kardashian West weighs in at 128 pounds," she wrote. These two did look like a couple of fighters in the ring. There truly is nothing like sister fights.

Kardashian revealed that the fight came from a culmination of events.

"It’s so much deeper than all of these little arguments," one fan noted on Twitter. Kardashian responded, "So much.  #KUWTK it’s been years of build up." It's obvious that this fight was bigger than just the one comment made.

Watching this fight was so cringey, though.

One viewer tweeted, "@KimKardashian and @kourtneykardash fight was very cringe worthy." Kardashian responded, "It’s trash #KUWTK." Watching these two grown, successful women throw punches and kicks like their children would was just awful.

But Kim showed us that she can flip her mood on a switch. 

One fan tweeted a paparazzi photo of Kardashian in the same outfit she was seen wearing in the fight. They wrote, "never forget, this was the same day. #KUWTK." Kim retweeted the link, clearly proud of her ability to clean up from battle so easily.