[insanejudge]

Interesting (well, interesting to me) note on the nfs case, on modern linux, `umount -l` should be able to unmount pretty much anything. You'll often still be left with a pile of processes stuck in uninterruptible sleep depending on the scope of the 'random share', but at the very least it can staunch the bleeding and let you move around.

TBH I get rather claustrophobic when I can't `w` with aplomb.