Drop C Tuning
This is easiest if you bar the 3rd fret for most of it.
h(Hammer On)
/(Slide)
[ Tab from: http://www.guitaretab.com/a/as-i-lay-dying/295353.html ]
|---------------------------------------------------------------|
|---------------------------------------------------------------|
|---------5---------------5---------------5---------------------|
|-----3-------3-------3-------3-------3-------3-------3---3-----|
|-3h5---3-------3-0-0---3-------3-0h1---3-------3-1/3---3-------|
|---------------------------------------------------------------|
