I derp far too often... For example, in school (my school of SIX YEARS) I couldn't find the printer in the tech room. I asked a friend, who said the huge black thing. Guess what, the HUGE BLACK THING was in fact HUGE and BLACK and IN THE MIDDLE OF THE ROOM. He still had to walk me to it... To be fair it was also a copier... if that's any excuse...
Also the amount of times I've been talking on the phone and my friend's talking to them because I never mention and we're looking at a computer screen. It's kind of rude when somebody's mid-sentence to just burst out with "Yeah okay, bye." I hurt his feelings...