Kendall Jenner is a fun-loving gal.

At least, that seems to be the message of her latest Instagram photo. She's enjoying a snow day in just a barely visible black triangle bikini, giant furry snow boots, and dark sunglasses.

In the first photo, she's standing up straight and looking pretty serious; in the second, she's running while holding up her bikini top; in the third, she's running so hard she's basically falling over; and in the fourth, she's running with a very serious look on her face. For her sake, I hope she didn't fall.

The founder of 818 Tequila captioned the post, "Wim Hof said ice baths."

The Wim Hof method teaches people to endure extreme temperatures.

People went crazy for the photo, but no one was more enthusiastic than the model's famous sisters. Khloe Kardashian, "You better fuck yourself!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!" she instructed.

By comparison, Kim Kardashian went for a more subdued three-fire emoji comment, while Kardashian's favorite hairstylist, Jen Atkin, said, "Same here."

A few hours earlier, Jenner posted a photo of herself kneeling in the snow in full snow gear (relieved to know she owns some snow gear, TBH), feet pinned to a snowboard. She was wearing a fabulous shiny silver puffer.

The post also included a video of her snowboarding like a pro and a nice photo of the mountain where she snowboarded.

Jen Atkin commented, "So this is what it means to have Olympian pedigree, hmmm." Here Atkin is likely referring to Caitlin Jenner, who competed in the Olympics in the 1970s.