Good Riddles

Question: There has just been a heavy snowfall, Jeff goes out side and finds that there is twice as much snow in his garden as his neighbour's Kate but Jeff doesn't seem surprised.Why?

Question: I always murmur but never talk, i always run but never walk, and I have a bed but I don't sleep. What am I?

Question: What goes up but never go down?

Question: What do you get when you cross an elephant and a fish?

Question: Why was the woman fired from the car assembly line?