Okay, despite the cornball stories and usage of the word, the idea of seeing your "doppelganger" can be potentially frightening. In some cultures it's been said that seeing your doppelganger is a sign of impending doom.
And if you haven't heard the word before, a doppelganger is basically your exact double. And according to the paranormal encyclopedia, a doppelganger casts no shadow or reflection and usually have sinister motives behind their actions.
A famous story surrounding the idea of the doppelganger is former President Lincoln saw his own doppelganger and it's even been recorded in journals and others who confirm that he spoke of seeing his double in the mirror, where he saw two different sides of his face.
I'm pretty sure it would be very creepy to see my double and I'm not sure how I would react.
My biggest question is, if I saw my double, can I talk to her and get her to do things like pay my bills for me, and go to work in my place, so I don't have to? Is it possible to have a responsible doppelganger?
On another note, what 'evil' would your doppelganger do that you wouldn't normally do?