Perhaps she wanted to tell them that she wants to die, to be let go from her current prison.
It is ironic that this woman had an eating disorder and has been kept 'alive' by a feeding tube for years. If the feeding tube had not been put in long ago, Terri would have passed quietly. This is our current medical ethics situation -- technology has the ability to keep bodies functioning well enough for our mortal requirement for life. Perhaps this only cages the soul and impedes its progress.
It is an incredibly sad situation for all concerned.
We identify with each other's bodies, but we are not the body, we are the soul. When this experience ends, there is another to be met.