My first job was at a bank that used Windows 3.11 on all the corporate desktops (late 90s). We had 10mbit ethernet IIRC. Periodically someone somewhere would

My first job was at a bank that used Windows 3.11 on all the corporate desktops (late 90s). We had 10mbit ethernet IIRC. Periodically someone somewhere would plug both ends of an ethernet cable into the wall sockets, causing a broadcast storm and every PC in the building would freeze - Not even the mouse pointer would move.