This is an old and outdated riddle but the official answer is:
Man... young going up.. old with a cane coming down.
This doesn't make sense,most people answered a young man going up the hill,and then a old man with a cane coming down the hill! Hence the third leg,but a cane is not a leg,it's a walking stick used to support ones inability to walk on two legs.
There are many answers, but I would say a plane when it lands.
A mythical creature or a
its rigth a young to old guy
A 3 legged Dog
rory
Air Plain
Banana
A lawyer and a senior citizen are sitting next to each other on a long flight.
The lawyer is thinking that seniors are so dumb that he could get one over on them easy.
So the lawyer asks if the senior would like to play a fun game.
The senior is tired and just wants to take a nap, so he politely declines and tries to catch a few winks.
BUI
3 legged man comes down with fourth because hes a old man with a can
dog
a wheel barrow
AN OLD MOTHER TRUCKER
What has eight legs but has more eyes
The last three-legged shrimp. He was the last of a dying breed. RIP
i think its not an animal but a human because the "mountain" is when your born and when u die so when u r born u need your arms to balances and when u can walk you are on top of the mountain and as u get older u need a cane to help u walk and that's when u get down from the mountain :)
A spider that flys in the air and then an aeroplane cuts off 5 of its legs and then the spider falls on a gluey feather in the sky which gives him another leg and then he lands with 4 legs. ...there is a simpler answer which i don't know... ENJOY MY VERSION:)
Nothing
Centipede on its back.
What came first. The egg or the Hen. What climbs mountain with four legs but comes down on three legs.