Examples:

• I believe that we must all get to work on concluding this third rail package.
• Doping is the third rail of the Olympics.
• Social Security is the third rail of American politics.
• South of London, the Southern Railway third rail electrification system continued to expand.
• Conflicts of interest, which used to be the third rail of journalism, now seem to have become like herpes instead.
• They have also performed at the Under Armour the third Rail Jam Festival in Sunday River, ME late December 2011.
• By merely adding a third rail you cannot possibly alter the appearance of a railway.
• The electrical supply uses a small third rail shaped like a V with a pickup that pushes up on the bottom of it.
• Should children walk off the footway they could come into contact with the electrified third rail.
• There is no question that without effective protection much wild life is destroyed by this third rail.