Normal iPhone cases are fine, but I much prefer the variety that make your phone look like something else entirely. For example, an old Nintendo cartridge.

Designed by Meteor, these iPhone 4 cases are made to look like the back of old Famicom and N64 cartridges, which will confuse people into think that you are crazy and talking into an old video game instead of your phone. Of course, these will set you back about $57, so you've gotta be real committed to the retro gaming thing for this to be worth it.

Kotaku Japan via Gizmodo