I was checking out the new google earth functionality and their new closer satellite photo sets they've just installed.
I was measuring something and google told me it came to 67'
I thought to myself hmm thats a shame i know for a fact its 62' long so its out about 8% - a minute or two later i slapped myself in the side of the head thinking wtf are you talking about, you are measuring something on a computer from freaking SPACE!!!!
All of this without getting your fat ass out of a chair and looking for a tape measure.
How quickly we forget :)