How you know you're talking to a "climber" before a holiday weekend.
I have many stories about people who pushed dates to look good for superiors, despite the most concrete statements to the contrary about project readiness. My favorite was when a manager said that all the code from that group was complete and ready for us to build against, on time, and even early! When we really dug down into what was done, in that very meeting, it became evident that they'd finished things up to a point - a point we couldn't code against - and just entered everything left over as a bug to be fixed in a future release. They were ahead of schedule. We were obviously behind schedule as we weren't going to start our coding immediately.
Title: How you know you're talking to a "climber" before a holiday weekend. Snarky: I know the bug fix isn't tested yet, but I just cc'd our Directors + VPs confirming that you've committed to having it released by next Monday morning.