guru effect

When you have a technical problem you can't fix, but when you try to demonstrate it to an expert, it magically goes away, leaving you looking dumb.

"My PC was bluescreening all day, whenever I moved my mouse, but when I tried to show the IT guy what was happening, it worked fine and it hasn't happened again. Total Guru Effect."

Nostalgiacide

The childhood-crushing feeling you get when you realize how bad the shows you loved as a kid really are.

"I just watched Dinosaucers for the first time in years. I loved that show as I kid, but I couldn't even finish the episode it was such crap. Complete nostalgiacide. My childhood is ruined.