catatonic

adj. Describes a condition of suspended animation in which something is so
wedged or hung that it makes no response. If you are typing on a terminal
and suddenly the computer doesn't even echo the letters back to the screen
as you type, let alone do what you're asking it to do, then the computer is
suffering from catatonia (possibly because it has crashed). There I was in
the middle of a winning game of nethack and it went catatonic on me! Aaargh!
Compare buzz.

