Usually if you're involved in something that is genuinely urgent, it doesn't even need to be said. I remember being in a situation where a server wasn't starting back up after some changes while we were in the data centre, and if it didn't come online by the time we left the office, one of the largest pay as you go networks in the UK would have gone down lol. If a PM had approached us with something 'urgent' during this they'd have to run away from projectile rack mounts..