I am a vicous man-killer when i am angry but I am gentle and calm when I am happy. I can be a home pet but my fangs dont suit the job. I have a legend about me but I know it might not be true.

I may look scary but I am not really that scary. I may walk into your garden but then I would tell a lie.

What am I ?

I live, yet don't breathe,

I am freezing.

I am never thirsty, but i always drink.

WHAT AM I?

After a long way, a truck driver ends up in front of a tunnel. He can not get through without severely damaging his truck, because the tunnel has a height of 3.00 meters, while his truck has a height of 3.01 meters. The driver would like to pass the tunnel because the other way will take him at least 1 hours. Suddenly he gets a great idea, he immediately starts doing some things and after 10 minutes he is back on track on the other side of the tunnel. What was the great idea of the truck driver?