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The Best Toilet Prank Ever!

The Best Toilet Prank Ever!
This is my favorite toilet prank so far.  When your victim flushes the toilet, the water goes down, but the water stays yellow.   This prank will make it seem that the toilet is broken, or the pipes might be clogged.  Another reason Why I like this prank is because you can do it in less than thirty seconds. 
 
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Step 1Ingredients

Ingredients
Food coloring (I like yellow, but I guess you could do another color)
Syringe (Optional)
Toilet!
Victim
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7 comments
Apr 1, 2012. 8:38 PMPSPerson says:
Why not just go for an upper-decker? xD
Oct 2, 2011. 9:28 AM234nightfox says:
Try it with a tea bag, Funniest Thing EVER!
Sep 4, 2011. 9:52 AMcornonthecobert says:
How long does it stay?
Sep 4, 2011. 9:51 AMcornonthecobert says:
Blue...because i want blue water!
Sep 4, 2011. 9:47 AMmmoore10 says:
Oh! Green for St. Patrick's day!
Sep 2, 2011. 4:45 PMtqwerty says:
HAHAHA

I can imagine someone standing there for an hour, especially as a guest at your house.

Now try brown!

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Author:building king
Hmm... I am thinking about posting an instructable every week. Please tell my why I should in the comments. You are also welcome to give me any ideas for my next instructable.