Gary

       Gary was eating a sandwich in his living room, when a strange man appeared out of absolutely nowhere.
    “Aha!” Exclaimed the man. “I have done it! Time Travel is possible! And they told me I was crazy. This’ll show them.”
    This man looked familiar. Gary had seen him somewhere before. His top-hat and beard were unmistakable.
    “Hey... Aren’t you-”
    “Abraham Lincoln, yes. Sixteenth President of the United States of America. I have traveled into the future.”
    “Good job.” Said Gary.
    “So, what is the future like?”
    “Pretty good, I guess. Can’t really complain about it.”
    Glancing at his watch, Abraham Lincoln gasped.
    “Oh, dear! I’m almost out of time. Quick, is there anything I should be warned about in my life. Any tragedy I could avoid?”
    “Hmm.” Gary thought for a moment. “Nothing I can remember.”
    “Then I must be going. Goodbye, future man.”
    Abraham Lincoln disappeared.
    It suddenly occurred to Gary that there was something important he needed to tell Mr. Lincoln. But, alas, it was too late.
    Later, Gary was skimming through a certain book of American history that he kept in his library.
    “On April 15, 1865,” The book read. “Abraham Lincoln was assassinated by John Wilkes Booth at the Ford’s Theater... And its your fault, Gary!