This guys thought it would be cool to fly an RC helicopter in formation with a real aeroplane, controlled from the aeroplane itself. It's pretty cool to see the helo spinning on the tarmac just to spring to the air as the Cessna gets within radio range.
The guys at HeliGraphix — the makers of the helo — completed their stunt in the Philippines, after three days of preparation. They flew the helo for 4.5km at 130km/h for 2:08 minutes of total flight time.
I wish I could this while flying across the Atlantic. [HeliResource]