I cannot speak for the UIC who issued this for ChessRef. For me, it is an umpire who "races" as if they are trying to beat the runner or throw. In some cases, it places the umpire in a position which makes it difficult to adjust to a problem which could be caused by a number of things including an errant throw.

Getting to the right spot with the ability to deviate in any manner necessary to make the correct call is what I want to see from an umpire.

Essentially its hustling yourself out of position. In mine for example, I paralelled (sp) the developing bunt and defensive crash instead of maintaining on the line and as a result I did not have my "cool" - he said I looked like I was fielding the bunt (I bet I woulda got em out too). You can't be seen as running around like a chicken with your head cut off - an umpire must always be cool and in complete control. Hustle - dont over hustle. You dont need to be speedy gonzalez, you need to be smart.

If you run like Speedy Gonazalez and get 4 feet from a tag play when you should be at 8-12 feet from a tag play - you over hustled.

Another example of overhustle is if a runner starts for a base, and the umpire hauls butt to get to that base, stops, plants, ready to make the call, only to turn around and see the runner had decided to hang back on the previous base. :D

I'm sure at some point in time, we've all done that one.