During a routine run in 1986 a few days after the Chernobyl fire, one of the pebbles became lodged in a pipe feeding the fuel to the reactor.

ECONOMIST: Prospects for a new type of nuclear reactor look mixed

As with many Internet memes, however, the concept quickly spread to the mainstream to the point where it's now fairly routine to run across references to "Rule 34" in blog posts and comment strings.

CNN: Your (additional) Rules of the Internet

Any strike action would mean hospitals would be unable to carry out routine operations and run many outpatient clinics.

BBC: Junior doctors still heading for strike

They run a routine patrol in the city of Baghdad, and he approached them.

CNN: Martin Savidge: Public might not trust ex-police

Two patients died following routine surgery at a privately-run NHS clinic in Stevenage, an NHS trust has said.

BBC: Probe into deaths at Lister Surgicentre in Stevenage

Dortmund, like Bayern on a superb run, looked to be cruising to a routine home win when their Japanese star Shinji Kagawa put them ahead with his fourth goal in three league games on 33 minutes.

CNN: Leaders Borussia Dortmund denied in eight-goal thriller

Defending champions Egypt cruised into the knockout stages with a 100 percent record after a routine 2-0 victory over Benin which extended their unbeaten run in the Africa Cup of Nations to 16 games.

CNN: Nigeria and Egypt cruise into last eight

Another tactic: Build time for mind wandering into daily routines, breaking away from tasks requiring concentration to take a walk or run, look out a window or do some relaxing, routine physical task.

WSJ: Tactics to Spark Creativity

He was largely blamed for the Red Sox's defeat in the 1986 World Series against the New York Mets after he misplayed a routine ground ball in the 10th inning of Game 6, allowing the winning run to score in a 6-5 Mets victory.

FORBES: The Eternal Misery Of The Baseball Goat