Wikipedia Attack
Going to Wikipedia with the intention of quickly looking up some facts or background on a given topic or person and getting sucked into article after article with each article getting farther away from the topic you originally looked up. A typical Wikipedia attack will last at least 30-45 minutes.
"I'm late because I wanted to double check Whoppi Goldberg's birthday but I had a Wikipedia attack and by the time you called me to see why I was late I was reading about UPS."