Witness (A) lives in Ludington MI right on Hamlin Lake. About 2 years ago my girlfriend and I witnessed a star like object that was jetting back and forth, stopping on a dime, then up and down and then went backwards again, then finally took off out of sight at crazy speeds. Since then we, well mostly me, have been paying attention. I have seen many "moving stars" but none as fast as that first one. So I kind of gave up until last summer on calm evenings and nights I began to hear what sounds like pulsating EMP's in your eardrum coming from across the lake in the miles of uninhabited sand dunes. When it first starts out it almost sounds like you can hear your own heartbeat but as it peaks in intensity it is clear for about 10 minutes to the point you can point at the direction it is coming from as sounds travel great across a lake. I have pointed it out to mother and girlfriend and they are just as baffled. It started last summer and haven't heard it because I have not been outside much lately, especially at night. Also the fall time is almost always windy around here, which blocks out noise well, but the other night was calm and I went outside and seemed like the sound has even grown in intensity since last summer. Just think someone should check it out cause it is unlike anything I have ever heard and doesn't go with any technology I know of."