When a puggle grows sick of being somewhere it will just go. If that means running off a hand and falling into a lap, they will do so.
So Rexie only fell a few inches and handed on her back, but her spines penetrated my jeans around the top of my legs and groin. One of the spines pierced the fly and went a little way into the skin of my dick.
It hurts and itches a lot.
So let that be a lesson to you.