A sea diver is a real show-off. He showed everyone that he can hold his breath underwater for 15 minutes.

I went to the diver and told him that I can be underwater for double the time i.e 30 minutes.
He responded that he will give me 100$ if I would be able to do it. I won 100$.

What did I do?

How many words can a quill made with the feather of a pigeon write with a 100ml bottle of black ink?

I am a type of room you cannot enter or leave. Raised from the ground below, I could be poisonous or a delicious treat. What am I?

It's a protector.
It sits on a bridge.
One individual can see directly through it, while others wonder what it hides.

What is it?

What kind of tree can you carry in your hand?

Why are televisions attracted to people?

Forwards I am heavy, backward I am not. What am I?

How can a man go eight days without sleep?

When does a USA Potato change its nationality?

How many minutes are there in Feb 2017?

Note: The shortest answer is the correct answer.