Things aren't likely to keep getting any better for one of the blind date teams that's been struggling to work together on The Amazing Race.

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Hayley and Blair have argued over pretty much anything that crossed their paths for nearly every leg of the Race thus far, and when the teams head to Peru it appears that they will both hit their boiling points once and for all.

"Watch the fireworks," a voiceover says in a preview clip for the May 1 episode.

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Unfortunately in the case of the two medical professionals, fireworks won't be good thing.

"I can't stand looking at you, let alone having to be around you," Hayley says to Blair in the clip.

Blair also seems to be pretty over hanging with Hayley, after he makes a comment during the roadblock (which requires using a machete), about how he wouldn't want to run into her when she had one in her hand.

"Her with a machete scares me," he says.

While they deal with personal issues though, it appears most of the other teams will also struggle throughout the leg, as the tasks and the altitude (10,000 feet up) will take their toll on them.

"10,000 feet up the Peruvian Andes offer a special challenge," the voiceover says.

This appears to be especially so for Mike and Rochelle, the only previously dating couple still in the race (the other previously existing couple, Matt and Ashley, became engaged during the Race).

"It's such a high elevation, and running up hill," Mike says in the clip as he and Rochelle struggle up a street.

But the tasks aren't easy for teams either, as one particular one involving potatoes seems to greatly frustrate both Matt and Ashley and Tyler and Laura when their hard work doesn't pay off.

The Amazing Race airs Fridays at 8 p.m. on CBS.

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The Amazing Race, CBS, Reality TV