Kim Kardashian, 40, joined older sister Kourtney Kardashian, 42, and friends for a chilling experience on Saturday.
During Kourtney's lifestyle brand's Poolside with Poosh event, attendees were challenged to dip into a chilly ice bath.
Later Kim documented the whole thing in her Instagram stories.
Kim Kardashian, 40, joined older sister Kourtney Kardashian, 42, and friends for a chilling experience on Saturday; Kim wearing SKIMS in an Instagram post
Prepping for the plunge: 'Let's do a quick countdown,' Kim can be heard suggesting in the first clip as she sheds a white robe
'Let's do a quick countdown,' Kim can be heard suggesting in the first clip as she sheds a white robe.
'It has to be like three, two, one, go!' she says hastily.
An instructor agrees, 'Yeah. We're going to do three, two, one, you're going to sit down - sit your butt to the ground, [then] you're going to lean back.'
In the frame six women stand outside the personal tubs in bathing suits as they anticipate the pending chill.
Cold! During Kourtney's lifestyle brand's Poolside with Poosh event, attendees were challenged to dip into a chilly ice bath
Then another voice, outside of view, says 'The extremities get really cold,' advising the group to leave their fingers and toes outside the tub.
A shocked Kim says, 'Wait, what?' before completely dropping her cover-up and sinking into the tub.
The reality TV star shouts out an expletive several times and then screams as she withstands the low temperature for a few seconds.
'Oh my god!' she yells before stepping out of the bath.
Across the clip the entrepreneur wrote, 'I couldn't handle it!!!!' with an ice and crying laughing emoji.
Ice shock: 'Oh my god!' she yells before stepping out of the bath
Trying again: The KKW Beauty founder gave the cold soak a second go before gracefully bowing out for good
Out for the count: She retrieved her robe and crouched down to encourage her friend, and brother Rob Kardashian's ex-girlfriend, Adrienne Bailon
The KKW Beauty founder gave the cold soak a
