So, imagine if you will...
We had a very heavy comforter and so I took off my pajama bottoms to sleep. Me being me I threw them on the floor. One morning I got up and put on my bottoms, and felt something inside my left pant leg. It was kind of fuzzy, so my mind told my mind that it was a piece of fuzz. It couldn't be anything else, right? So I stuck my arm down my leg and grabbed it. When I grabbed it, I knew it wasn't fuzz.
I threw it out onto the floor, simultaneously jumping and screaming REALLY loudly. A fuzzy caterpillar. Ah, so harmless, so I laughed hysterically and kept flapping my pant legs with my arms. M came in to be sure I wasn't dead, picked up the caterpillar, and brought him outside, likely to fry in the desert.
And you know what, I care only just a little if it fried. Because this is what it did to my leg in its self defense:
You can see how long the caterpillar was. I still have the marks on my leg even now.