I took a friend on a bike ride. We ended up in Balboa Park, San Diego, right under the planes coming in. He is a photographer and we got some great shots. After a huge plane came in, like 40 seconds later, I heard a whooshing. The trees started moving. I thought a helicopter was landing. I heard a high pitch whip sound. It was the turbulence of the plane. The 40 second delay was weird. It was like two hurricanes were hitting. In different directions. I have been there many times and that was a first. Interesting.