I worked on an amazing web app that tracked satellites and their failure rates. it was beautiful and worked fantastically. Me team worked like dogs to get it done three months. Our manager insisted it has to work perfectly for the demo and we delivered... We all got raises and everyone was happy, right? WRONG!

Demo day comes and management decides that they don't want to build the app because the customer pulled out. Sooo my manager then asked me why I wasted so much time building it when static images would have been fine. I lost my cool and yelled at my manager "YOU'RE THE ONE THAT TOLD ME TO GET A FULLY FUNCTIONAL SYSTEM WORKING!" Then I stormed out of the meeting.

It is still the coolest thing I ever built. Too bad it will never see the light of day.