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How to pull a prank for april fool's day
Set it up where a person is comfortable.
That is, pick a place that is a part of the person's normal routine. If you try to get them to come to the prank rather than having the prank come to them, they're more likely to be suspicious, especially on april 1.
For instance, set up the prank in their home or work, as they are most comfortable there. If you ask them to meet you somewhere or come outside, for example, they may become suspicious.