My wife had the following problem coming home from work today in our 2.2. 2004 Sri,

Pulled away from traffic lights, going through gears loss of power going into 3rd but when pulling away the door open alarm was sounding, pulled over and engine cut out with all lights and dash disappearing not even allowing hazards to work. turned key off then turned back on again and car was fine. No engine mamagement light before or after incident