One minute, things are fine.

Kimkardashian / instagram.com
The sun's out (sort of), the birds are chirpin', the gals are wrestlin'. Life is good.

khloekardashian / instagram.com
Then all the sudden, it hits you all at once, like a brick or a can of peas. THE DOUBLE-BOUNCE.

khloekardashian / instagram.com
The double-bounce 'ain't no joke.
Double-bouncing is literally living life on the Dangerous side with a capital D.

kourtneykardash / instagram.com
It's not for the faint of heart. If you can't handle it, you simply gotta walk away.
Or go to the hospital if it's bad enough.

kyliejenner / instagram.com