It's all fun and games until somebody gets hurt!
Khloé and Kim Kardashian seemed to be having a ball while bouncing around on a backyard trampoline, getting some serious air and, of course, making "tramp" jokes on Instagram.
"in the hospital thanks to @khloekardashian," the 16-year-old wrote on Instagram. "(Look at her page for the reason why) my mom said 'never thought I would take u to the doctor for a trampoline accident at this age) this means war Khloe. Ps. It was painful taking this photo."
Kylie has her hand over her face in the aforementioned pic, but she appears to have hurt her back in the photographic evidence provided by Khloé.
"This started out calm and ended in a war! Sorry @kyliejenner!" Khloé wrote along with pics of the battle, which seems to have ended with the older sis declaring victory.
"Kylie this is proof you did it to yourself! Sorry not sorry! Just kidding I am sorry my little bug a boo!! Let the war continue!!!!" she continued, quickly adding, "LOL I love you @kyliejenner."
Though there are some actual tiny tots in the family, trampoline time at the Kardashian-Jenner homestead is apparently an adult affair.
"Lady and the tramp...you pick who's who," Khloé joked along with a photo collage showing her and Kim jumping for joy—pics she shared after making her point to Kylie, which suggests that her kid sister's injuries thankfully aren't too serious.
"Ladies on the tramp," wrote Kim along with her own assortment of pics.
While Khloé and Kylie were dressed more casually, Kim enjoyed her playtime in a chic nude pencil skirt and cropped sweater.
Hey, just because she's bouncing barefoot on a trampoline doesn't mean she can't stick to her signature style!
Don't miss a new episode of Keeping Up With the Kardashians this Sunday at 9 p.m., only on E!