For number one, I'd definitely pull the switch. After all, the civilian on the tracks can leap out of the way if he's lucky and far enough away.
For number two, I'd realize the impossibility of the scenario and the extent to which this moral challenge simply doesn't work, and leave through the hole in faux-spacetime.
Alright, my turn for a couple. One of these is copypasted from a Role Playing Game, the other is my own invention.
1. While searching for your long-lost father, you become stuck in a computer simulation that is home to several people and is controlled by a twisted mastermind. He knows the current whereabouts and condition of your father, and will gladly tell them to you-For a price. In return for a piece of his information, he requests that you do something unspeakable to the simulation's human residents, such as making a perfectly happy child cry about his parents' nonexistent marital issues, killing a woman in order to break up a couple's marriage, planning and executing a unique murder for an innocent woman, and so on. This will continue until all of the residents are either dead or seriously hurt.
However, there is another way to learn of your father's location. In an abandoned house, there is a failsafe terminal to the simulation, which when used will kill everyone but you and the simulation's controller. The controller will be stuck in the simulation alone for all eternity.
You will be allowed to exit after either choice is complete, and either way the lives of several will be affected negatively. The question is: Which is the lesser of two evils? What would you do to escape and find your father?
2. You are locked in a room with two other people: Your loved one, and a prominent and influential figure to the world (The Pope, The President Elect, Yahtzee, whoever floats your boat). There is a simple wooden table with a revolver on it. The revolver has one bullet, and the door will unlock whenever one person has been shot or otherwise killed. So who dies? Note that there is no other way to exit the room. Someone must die.
My Answers:
1. I would rather kill the inhabitants quickly, painlessly, and anonymously. It seems far less cruel to do so, and justice would be served to the controller, who would be alone for the rest of his life.
2. In all honesty, I would shoot myself. I'm a regular saint, I suppose.