I attempted this a few times and it doesn't work. Nicotine has a tendency to make my mind drift away. One day in particular I was rolling on my riding mower puffing away, just enjoying the scenery in outer space, when I realized I had mowed halfway into my neighbors lawn. Come to think of it, about all I can do with a pipe is sit.. my kid could be screaming in the yard in front of me with a bloody stump of an arm and I'd not notice. My wife has picked up on this and likes to wait for me to light a pipe to ask me to do things I don't want to do, specifically because she knows I am brain dead and will give whatever auto-response needed to get her to stop talking.