It’s official. Cabin fever has finally hit the Big Brother house.

It was just a chill afternoon, and the guys were having “guy time.” BB19 contestants Mark Jansen and Josh Martinez were going head to head in a cool game of pool. However, after Josh scratched, but still tried to claim that he won the game, Mark was not OK with Josh’s attitude, and sore-loser Josh was not OK with accepting an L. Either way, someone was getting the loser juice: pickle juice and hot sauce. Although the bet was for the loser to drink the juice, Mark playfully decided to chuck the concoction in Josh’s face, and that’s when things went from zero to 100 real quick.

Mark and the rest of the houseguests were all trying to keep things light and playful, but Josh was already far from it. Josh called Mark a “coward” and got retribution by covering him with ketchup and mayo (because that’s the mature thing to do), and the next thing we knew, both of them were throwing F-bombs left and right at each other. We watched the two buddies turn into frenemies within a matter of seconds.

One by one, the rest of the houseguests came outside to figure out what the commotion was, which ultimately led to Josh attacking under-the-radar Jessica and more nitpicking between Dominique and Lord Voldemort (Paul).

Later that evening, it all came down to the live eviction and, to no surprise, by a vote 10-0 Dominique was evicted. So, while the battle between Dom and Paul may be done, the one between Mark and Josh has just begun.

Big Brother airs Sundays and Wednesdays at 8 p.m. and live evictions air on Thursdays at 9 p.m. on CBS.

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