Damn Technology!!

Ever have a great lesson planned or demo and you get to the part where the technology comes in and all of a sudden nothing wants to work! I had this scenario play out the other day in my math class. I had the projector hooked up to my laptop and I was going to show some things with graphs and of course nothing is cooperating. Makes you think quick on your feet, I guess. Technology...love it and hate it (at times).