What's the Kennection? #216

What 2004 horror film, a surprise hit, had only six days to shoot the bathroom scenes that make up the bulk of the movie?

What mechanical device, which only allows movement in one direction, makes socket wrenches (but not Miley Cyrus videos) possible?

Heron's Formula can be used to find the area of what shape?

Babar's capital city is named for what other elephant, his cousin and queen?

In 1998, 119,986 people in Florida set a world record by forming the longest line ever for what Cuban dance?

What's the "Kennection"?