I was using watch(8) this afternoon, and on trying to quit, ran into this:
peppercorn:~> ps axl | grep watch
0 14200 14194 0 -8 0 3416 1056 devdrn D p2- 0:00.01 watch -W tt
It was running on a pty, but the target tty was ttyv1.
Robert N M Watson
Computer Laboratory
University of Cambridge