I have out jumped the landing hill occasionally.  If you land centered, you will eat patella.  If your feet are a little forward and spread out, you will collapse back and between your skis.  Keep your back rounded and as you start to impact the snow, slap your hands on the snow out to either side of you.
Not saying that you should overshoot just to test this out, but if you really screw up and are still going up when you clear the knuckle, this may save you from the indignity OP is describing.