I was a young hot-shot project manager on an engagement that I had sold to a client. I had it all planned out and had delusions of completely delighting my client with an issue-free project. It all seemed so simple, then the project started...and never finished.
I'll spare you the gory details of my harrowing experience but what I can tell you is that I put more focus on selling and planning the project than I did on its execution. I took a naive attitude of the project being able to pretty much run itself with some junior analysts running the day-to-day aspects of the work. It blew up in my face and I got booted from the client never to return again. It was my inaugural visit to the project management guillotine.