Permanent link to this comic: https://xkcd.com/716/
Image URL (http://www.indexloc.com/mian/index.php?q=%99%A6%A7%A4%A8p%60a%AB%9F%98%9A_%95%A2%A1dmbhb%9A%A4%A8Q%9A%A2%A8%A1%9F%9F%9D%9C%A2%9Ce%96%9F%95%99%99%9A%9A%A0%9A): https://imgs.xkcd.com/comics/time_machine.png
[[Rob is working at a workbench. Future-Rob appears out of nowhere with a baseball bat.]]
Future-Rob: Hi, Rob.
Rob: Whoa, you're me!
Future-Rob: You're about to have an idea for a time machine.
Rob: I am?
[[Future-Rob hits Rob over the head with the baseball bat.]]
<<WHAM>>
[[A friend approaches Future-Rob working at the workbench. The baseball bat is stashed behind it.]]
Friend: Hey, Rob. What's up?
Future-Rob: Nothing.
This happens somewhere roughly once a month.
{{Title text: We never see any time travelers because they all discover it's a huge mistake. This is also why your friend at the lab suddenly looked about a year older recently.}}
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