California, 04-24-08

I was fishing on Lake Trinity, and heard the sound of an aircraft engine. It was a very low frequency sound, but I felt it more than I could actually hear it. I only had an older Sony digital camera with me. I snapped 4 pictures before the camera shut off, only one came out when I read the disk. I observed the aircraft until it vanished. It flew straight and level. I was unable to guage its size since I had no reference. But a best guess, I would say it was as big as a medium sized airliner.