Apple's nowhere close to being first out of the gate with a tablet computer, but there's something about its products that drive people into fits of creative insanity. While early tablet enthusiasts were focused on automating insurance claims adjustments, iPad fanatics are busying themselves with a wearable sleeve and app to automatically signal a bicyclist's intentions to motorists: sit upright (stop sign), lean left (left arrow), etc. Silly sure, but we expect it might be very popular in Berlin's techno subculture. Video after the break.