Once when I was a teenager I watched my dad (an electrical engineer) assemble a 486 PC from parts (the first of many computers I've since built or helped build from parts). While he was connecting the power supply I made a loud *BZZZT* noise and he jumped three feet into the air. He didn't live that one down for a while.
and they wonder why some parents beat their kids. not to advocate child abuse, but sometimes they deserve it