Need a good Halloween prank to put fear into your co-workers and loved ones? This head-in-a-jar trick should do just that.

The Head-in-a-Jar prank starts by merging three photos of someone into one continuous one. Photo: Dave Samson/The Forum.

Print on glossy film paper, or head to your local copy center and get a bit of help. My jar was six inches in height, so I created a horizontal image to roll into the jar.

Get the complete Head in a Jar DIY on Instructables. Have you made your own head in a jar? Let us know in the comments and tag @geekandsundry and @justjennrecipes on instagram to show us your ...

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