Caspian does this thing that is incredibly cute. If you are stroking him he pushes his little head back against your hand harder and harder and purrs and purrs with happiness. I got it in video, you can see how he's throwing himself back to get a harder stroke on his little head
His Mama does this too, and it is very endearing.
Anyway, the other day he tipped his head back so hard when being petted that he fell of my lap and onto the floor! *sniggering* poor Caspian! Oh, it was funny. But he got right back up for more strokes, so clearly his head or his ego wasn't too dented by the mishap.