Show your friend a picture of a spider.
Then get something fuzzy, or use your hair and touch their shoulder.
Make sure they don't notice what your doing.
If your a good actor/actress yell "Spider!" Only if they don't notice the fuzzy thing tickling them.
There's a really good chance they will think there is a spider on them.
This completely worked on me.
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Ways To Be Annoying
HumorHere's awesome and funny ways to annoy people. There's also a bunch of funny random stuff in here. Updated daily. (Completed)