Human Anatomy: Ribcage/Sternum

I’m 40 years old, and have just noticed for the first time that my sternum seems to extend below the point where my two lowest, front ribs meet. I am able to grasp this extended part and move it in and out a centimeter or so, as if it were attached by cartilage. Am I a freak? Er, that is, am I normal? Um, in other words, is this to be expected?

Google Zaphoid process

errr make that xiphoid process

i used to joke about it being somehow related to Zaphod Beeblebrox