Step 5Alternative Method
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You can also just go right to the last step and just put water into a cup, put the cup against the ceiling, and hold a broom handle against it. After this start shouting someones name in panic and 9/10 times they will come running to you. Then in a panic, ask them to hold onto the broom and keep everything there while you go get something and keep stressing that you are in a hurry. This method will usually work just as well at the first. Good luck and good pranking to you all!