That warp in the space-time continuum that happens when you get on the computer "for a few minutes" to check your email and the next time you look at the clock, it's 4 hours later. Similar to what happened to people in the movie "Looker".
Also akin to the NFL minute.
Man: "Honey, I'll be up for dinner in a few minutes, I've got to check my email."
Woman: "You said that last night. By the time you check your email, read the headlines, check your stocks, play Zuma, look for car parts on eBay, watch a few YouTube videos and download music to your iPod, it'll be midnight! A few minutes in 'computer time' is like a few years in dog years!"
Man: "True dhat!"