Cat run
Most cities have "dog runs," which are fenced-in areas for dogs to run around unleashed, "greeting" other dogs with cold wet noses in uncomfortable places.  This is what a cat run would look like: 
[Image: ny2009012603.gif]
Spot on, New Yorker. #nature

A beef
A "pot roast" was cooking in our slow-cooker all day yesterday.  I say "pot roast" because I don't really know what it is.  I know it's some sort of meat, potatoes, and carrots, and the whole concoction makes your house smell for days.  When I asked Wendy what kind of animal that huge chunk of meat came from, she responded, "It's a beef." #food

Some planes float
US Airways Flight 1549, which crash landed in the Hudson River on January 15, 2009, was an Airbus A-320, and as such was equipped with a "ditching switch" that sealed the plane by closing valves and ventilation ports, thereby enabling it to float.  (via Reddit) #technology