When being happy makes you sad

Do you ever get really excited about something, realize what you just got excited about, and then get extremely depressed?

The other day I successfully traced the history of a PIN related to a confusing situation we're having with a homeowners association.  I came to the conclusion that they may not, in fact, own a piece of property which they, allegedly, owe delinquent taxes on.

I was elated.  I don't mean I was just a little pleased with myself.  I mean I was bordering on giddy.  Hell, I was a problem solving machine!  You need a problem solved?  You come to me!  Why?  Because I'm king of the mother-fucking office, that's why!

Then I realized I just got that excited about a PIN.  I didn't cure cancer.  I didn't win a prize.  I didn't get a raise.  I didn't even reduce the amount of paperwork on my desk.  All I did was spend days tracing the history of a PIN.  And, as it turns out, my brilliant conclusion, though correct given the facts available, will probably require some additional investigation.  Crap.  I bummed myself out all over again.