An curved arrow pointing right. A video of a whale "breaching" out of the floor of a gymnasium recently went viral. Many believed it to be a 7D hologram, but it's the work of super secretive tech ...

A 50ft hologram has left Londoners gobsmacked as ... the visual feast and eyes remained glued upwards as a majestic blue whale gracefully glided through the night sky. Moments later, the whale ...