My Pet Boris (the magic spider app) is the work of magician Ian Pidgeon from Sydney Australia.
Most people I know, myself included freak out when they walk into a spider web so you can pretty much guarantee a reaction to this trick.
First of all I would like to credit Jim Pace’s The Web from L&L Publishing as the inspiration for this effect. The Web can be purchased from your local magic dealer or online through L&L Publishing or most other Magic sites. L&L publishing own the rights to the original “The