One of my dogs has a bizarre hang up. If I open my notebook computer, she runs into the other room. This has gone on for > a year. Now her brother has adopted the same behavior. He was never bothered by my going on the computer until a week ago when he started following the female out of the room. Tonight I opened the notebook and he was first to leave. If it was some undetectable-to-human thing emanating from the computer like an infrasonic sound, why did it only start bothering the second dog recently? I can't see anything but a psych problem causing this behavior and now with the second dog adopting the behavior I think that confirms it. Weird.