Simulated environment allowed safe learning of critical events and knowledge of appropriate response and treatment. Anesthesiology resident education curriculum in Lyon plans several high fidelity simulation session with a large panel of critical events. Anticipation of critical events before they may occur and plannification of team resources and priority in the treatment strategy may help to improve team performance during the scenario. The investigators' goal is to compare team performance during the scenario with or without a liberal preparation team staff of 4 min, suggested after the briefing of the scenario but before the scenario starts.