Double waves

I just thought this is a good demonstration of a double wave. Double waves aren't always like this and most of the time where I surf anyway the back wave will break or join with the front wave but sometimes like this and once I rode the front wave while another surfer rode the back wave and both of us had a long ride and never saw each other. Some of the surfers watching were concerned about someone dropping in on someone but they weren't sure who the offender was LOL https://www.facebook.com/WSL/videos/10155857026072058/