Harold, the cocky engineer.
This falls into the category: be careful for what you wish, you just might get it.
A cocky engineer continually remarked how valuable he was on the jobsite of a GE job.
The client, having had enough of it, finally said to the guy:
"Harold, you know how you frequently say: I wonder how you could ever do this job without me. Well, starting tomorrow, we're going to find out."
Harold was sent packing!