How do I get Ubuntu upstart to not hang on interactive start & stop?

I have created many upstart scripts that work fine during init, but often hang when I enter them at the console. If I CTRL+C out, all that happens is that the job changes state. The script is never run.

I’m running Ubuntu Lucid on a Xen virtual server with a Linux 2.6.39 kernel.

Below is merely a representative example of many scripts that behave this way:

description "apache2"

start on local-filesystems \
  and (net-device-up IFACE=lo) \
  and (runlevel [2345])
stop on runlevel [016]

respawn
respawn limit 10 5

expect daemon

script
  . /etc/apache2/envvars
  /usr/sbin/apache2ctl start
end script