02/05/2014 08:38 am ET Updated Feb 05, 2014

Kylie Jenner Rushed To Hospital Following Trampoline 'War' With Sister Khloe Kardashian

It's all fun and games until someone gets hurt.

Kylie Jenner ended up in the hospital Tuesday (Feb. 4) following a playful afternoon on a trampoline with older sister Khloe Kardashian.

In the evening, 16-year-old Kylie posted a photo to Instagram in which she's clutching her face, and wrote:

in the hospital thanks to @khloekardashian. (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.

Though unclear what injuries she is suffering from exactly, Khloe's Instagram account chronicles the afternoon in photos:

This started out calm and ended in a war! Sorry @kyliejenner.

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!!!!

Khloe later posted a photo where she's seen jumping on the trampoline with older sister Kim:

Feel better, Kylie!