Can you be the first to tell me what I am ?

Question

I always fall, but I never get hurt. I bend over backwards, but cannot break. I arrive free of charge but often leave for a fee. -*- Ok almighty thinkers of philosophy. I am really going deep on this one. Where are the people whose records show that they are able to completely defy all reasonable statistical probability and have answered thousands of questions and they are so remarkably gifted that they have had the genius to get chosen as best answer over 70% of the time. Hey, I think there is one who sports a staggering 90% best answers. I am humbled by your genius !

Answer 1

Edit:

I looked it up:[

I'll get the next one!

But I've got one for you: It's weightless, it can be seen by the naked eye and if you put it in a barrel, it makes the barrel lighter.

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The answer is

A hole

Answer 2

(your) hair

I'm smart, I know. (Okay so, my teachers may deserve some of the credit.) :D

Do you know this these?:

1. How far can a dog run into the woods?

2. We all know that the United States celebrates the fourth of July, but does New England have a fourth of July?

3. If every side of a house faces South, and a bear comes into the house and eats all the peanut butter, what color is the bear?

Answer 3

an admissions gate