Answer:
I have two bodies joined together as one. When standing still, I run and run. What am I?
I will disappear every time you say my name.
A woman shoots her husband. Then she holds him underwater for five minutes. Next she hangs him. Right after she feeds him dinner. How can this be?
I come with a train and go with a train and the train doesn't need me but can't go without me.
Curtail me thrice I am a youth; behead me once a snake; complete I'm often used in truth when certain steps you'd take.
I go in hard, come out soft. Blow me hard and I'll make a pop. What am I?