The Real Housewives of Orange County go for quite the ride on Monday’s episode – and PEOPLE has the exclusive First Look.

In celebration of her husband Eddie’s birthday, Tamra Judge and fellow Housewives Vicki Gunvalson, Kelly Dodd and Heather Dubrow travel to Glamis, California to hit the sand dunes on ATVs.

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After Judge settles into the driver’s seat with Dubrow at her right and Dodd and Gunvalson in the back, the ladies receive some safety advice from Tamra’s brother, Kenny, before they embark on their roller coaster-like ride up-and-down the sandy slopes.

“If this thing goes over, the last thing you want to do is stick your hand out,” Kenny instructs the women of keeping their hands inside the vehicle.

“What do you mean if it goes over? Don’t say that,” Dubrow responds.

Each wearing a helmet and screaming in excitement – and we mean lots and lots of screaming – the women take off and enjoy the winding desert terrain.

Not long after Bravo personalities catch some speed, Tamra says, “Oh s—, I’m scared” before things take a turn for the worse as the ATV flips, Dodd’s helmet falls off and the sand-filled video cuts to an eerie silence.

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“I still have nightmares today thinking about what happened,” Dodd told PEOPLE Now in August of the crash, which led to medical evacuations for some of the ladies.

“Vicki had a concussion, so did Tamra,” she revealed. “It was just a really, really bad accident.”