One of the most popular Halloween costume videos for 2011 is the ‘hole through your body’ costume.  

 took two iPad 2’s and taped them to his body. Then he put two holes in his shirt with fake blood, putting the iPads where the holes are. Finally, he just connected the two iPad’s via Facetime video chat, and viola, it looks like he has a hole in his body that people can ‘see’ through.