John visited his friend George and he noticed all these bear-hunting trophies in George's house. Bear furs on the couches, an embalmed bear head on the wall... so he asks George with curiosity:
-George, how did you get all these without getting a scratch? Aren't bears very dangerous to hunt?
-They sure are. But I have a trick... I usually go to caves where the bears have nests, but I do not go in. I just stay at the entrance and I shout "OUOUououououOUOUouou..." If there is a bear inside, she will do the same and I hear her also shouting "OUOUououououOUOUouou...". Then I can see two little lights in the dark... it is her eyes, she is looking towards me.  Then it is easy to aim and shoot, and then I can go in safely and get her.
-Ohhh I see... that's a good trick...

So John goes on to try it too but when George meets him again, John is all wrapped up in bandages and going around on crunches...

-What happened to you John?
-All this happened because of your trick.
-What happened exactly?
-I went to a huge cave and stood at the entrance...
-yes...
-And I shouted "OUOUououououOUOUouou".... and I heard the responding "OUOUououououOUOUouou" and then I saw the two little lights in the dark...
-And then what?
-Then the train came out and run me down....

In the older days when cars were not around in abundance and there were still horses in the villages, there was this guy who visited Athens for the first time and took a taxi. He started asking the driver questions about the car persistently...
-What is that thing there?
-That's the steering, I guide the car with this
-And what is that...?
-That's the gear stick...
-And what is that other one...?

So the taxi driver was getting a bit irritated. When the passenger asked once more about the Mercedes emblem on the front of the hood (remember those older models had the Mercedes emplem standing on the front of the hood)...
-And what is that...?
-Oh, that is to take aim on the pedestrians...
-Aim on the pedestrians? Show me, please!

So the driver pretends that he is taking aim on a pedestrian and he drives on to him. At the last moment of course he turns the steering and passes him. But he heard this big "bang" noise behind. So he screams:
-Hey! what happened?
-You are a lousy aim... If I had not opened the door we would have lost him....