Two all-star teams have already fallen in the latest Amazing Race for $1 million, but a preview clip for the upcoming leg of the race shows several teams at risk for elimination.

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While Guangzhou China saw the downfalls of Season 21 twin sister Natalie and Nadiya Anderson, as well as the new "Team Kentucky" in Mark Jackson (Season 20) and Mallory Ervin (Seasons 17 & 18), the next destination of Kota Kinabalu, Malaysia will see the remaining teams facing some of the toughest physical challenges in the race's history.

In a preview clip for the episode, titled Welcome to the Jungle, teams will make their way to the Malaysian city and face challenges including a tribal dance, walking through the deep jungle and participating in a pipeblowing task, rappelling down a waterfall, and white water rafting. Adding to their troubles, the teams will also potentially find themselves racing during a severe rainstorm.

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Between the storm and rafting on some rapidly swirling waters, several teams will find themselves at risk for elimination after the task does not go according to plan. Both Leo Temory and Jamal Zadran appear to tip over at one point, as do Rachel Reilly and Brendon Villegas.

Reilly and Villegas have a particularly scary moment after overturning when their raft appears to float away and Brendon drifts away from a panicked Rachel, who is fighting not to drown in the water.

"Brendon!" she screamed in the clip, as he shouted back, "Hold on!"

Another team that appears to panic a bit at the rafting challenge is Team Youtube, Joey Graceffa and Meghan Camarena. While they are not seen completing the task, Graceffa's voice is heard saying "Oh my god" as another raft enters the river.

Amazing Race airs Sundays at 8 p.m. on CBS. Watch the clip below:


Tags: The Amazing Race CBS Reality TV