Oh, I didn't even see the one. It's a mountain. Stop yanking riddles from The Hobbit.

Ok.

There is a man hanging from a rope in the middle of a bare, unfurnished room. On the ground is a puddle of water. How did he kill himself?

Oh oh I got number 1. It's a hooker!

He was standing on a block of ice with a noose around his neck, when the ice melted he died, and there was a puddle left on the floor.

Or he could have just been a badass, thrown the rope around a water pipe on the ceiling, pulled himself up with one arm, and tied it around his neck with the other. Since he was such a badass, the pipe came out of the fitting a little bit, and water started leaking onto the floor.

That's probably what happened.

Hooker is wrong.

Mr. Bob is right with Mountain, but I didn't rip it directly from The Hobbit...

Ha....

The barrel is made of wood, what can you put in it that will make the barrel lighter and can be seen with the naked eye?

A lit match to make it burn???

It will lighten it up and once the barrel catches fire then whoomph! people from a long way away can see it...:p...am I right???

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Anyone gonna guess the two of mine that are still waiting to be answered correctly???

Two legs I have, and this will confound: only at rest do they touch the ground! What am I?

and

I have four wings, but cannot fly, I never laugh and never cry; On the same spot I'm always found, toiling away with little sound. What am I?

Windmill.

YAY!!! You got it...:D...now how about the two legs one???

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Am I right with the match Sin??

Nope, didn't get it right. the barrel still has to exist.
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A bird -_-

Nope. 'S not a bird...

Hmm, make it lighter and visible to the naked eye...does it mean that the barrel can be seen by the naked eye, or the thing that you put in it???

Wait, that destroys the point of a riddle...don't answer...erm...a light???

Keep trying....think outside the box though.

Ah...outside the box riddle...I'm screwed...

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Erm...something outside the barrel that makes it lighter and visible to the naked eye...a spotlight trained on the barrel???

He he he...I'm a not giving up on my "light" idea...:p...to be honest, I can't think of anything else...

Just wait for 'K_A'...he'll google it and get the answer for is all...:p

well, it has to be put into the barrel, just remember that.

He he he...think outside the box that goes in the barrel...:p...

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Anti-matter??? No wait...that would annihilate (sp??? I'm sure I've fucked that spelling up)...

SOmething that goes in something and makes it lighter...helium???

Umm, that might make it float, but technically it gains mass if you put helium in it....

this is so much fun.

It's not fun...I can't guess it...:(...

I'm pretty sure that you can't put something in something and make the second something somewhat lighter...surely the only way to do that is subtract things from it...VACUUM!

A hooker fits the definition perfectly! I'm making the answer a hooker!

Oh and you would put a beaver in the barrel, and it would get lighter, after a while...