Why did the Earth suddenly enter a manic episode then go back to a depressive episode?

Because it's bipolar.

What if earth rotates 30 times faster?

Interviewer:"If the Earth rotates 30 times faster, what will happen?" engineer:"We will get our salary everyday" :D Think Greedily Act Confidently

What on Earth did the NASA discover?

Nothing, it was on Mars

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What room is it?

When you arrive at the international airport you are American. There is a room that changes your nationality. When you enter this room you are Russian, when you leave this room you are Finnish, and while inside European. What room is it?

How did Henry VIIIs wife enter the room?

Amble in (Anne Boyeyn) I made this joke up and am very proud of it