http://blog.fourherrings.com/2009/07/21/head-suspension/

I’ve gotten to test my little contraption here in Zapata and it’s working like a charm. My motivation is that after the three or four hour mark, my neck gets a bit sore. And after a seven hour flight last year, I remember it becoming hard to think straight because of the strain. So, I came up with this spring system to take some of the weight off my neck during my attempts at eleven hour flights here in Zapata.

I bought a four dollar key chain thing at Lowes that extends and retracts twenty four inches.