What if your tattoo was only sometimes visible? Would you do it? Anthony Antonellis set out to do just that with a small RFID chip implanted into the back of his hand between his thumb and forefinger. The chip stored in a glass capsule has a KB of storage. It is completely invisible.

At least, until you hold a smartphone to his hand to see the small GIF that's in there. The small GIF is a rectangle of rainbow colors passing through it. Antonellis can change that at anytime too.

Check out a video of Antonellis explaining how he did it below. And more importantly why.

Anthony Antonellis, Via Wired