What is so fragile that saying its name breaks it?

Can you count the number of quadrilaterals in the picture below?

What do you get if you add 2 to 100 four times?

Why are all black people so quick ?

John was so frustrated to be the suspect of being a sleeper terrorist that he shoot himself right between the eyes with a revolver in his toilet. The revolver and the bullets were accurate. Minutes later John walks out of the toilet unharmed.
How can this be possible?

What occurs twice in a week, once in a year but never in a day?

Assume the given figure to be a delicious doughnut. Yes, now you can concentrate more on the puzzle. So you have this delicious doughnut in your refrigerator when your friends come knocking at the door. There are eight of them. Now you have to make three cuts in this doughnut so that each one of you nine people can enjoy a piece of it. Neither you nor your friends would mind the size of their piece as long as they are getting it. How will you do it?

How can you make a TV, a bed, a dog, and a car liquid?

What number should come in place of the question mark below?

A bomb goes off.
Carnage.
One person, only a few feet away, survives! How can this be?