this is the original spider on the hand prank app. youtube: "i told you not to do that" do you know anyone who is afraid of spiders? everyone is, right? then this is the perfect magic trick/prank for you. my pet boris app is the scariest app for the android. inspired by jim pace's magic trick "the web" where a spider magically appears on the back of your spectator's hand. bound to get amazing reactions. the app uses the idea of "augmented reality" merging real life objects with computer generated graphics to create a truly frightening effect. the magic spider effect you take a photo of the spectator's palm (secretly loading a plastic spider on the back of their hand) and place the phone on their palm to hold. your pet boris - an australian red back spide