"On July 25, 2000, as Chirac and the first lady were returning from the G7 Summit in Okinawa, Japan, they were nearly killed by Air France Flight 4590 after they landed at Charles de Gaulle International Airport. The first couple were in an Air France Boeing 747 taxiing toward the terminal when the jet had to stop and wait for Flight 4590 to take off.[29] The departing plane, an Aérospatiale-BAC Concorde, ran over a strip of metal on takeoff that punctured its left fuel tank and sliced electrical wires near the left landing gear. The sequence of events ignited a massive fire and caused the Concorde to veer left on its takeoff roll. As it reached takeoff speed and lifted off the ground, it came within 30 feet of hitting Chirac's 747..."
https://en.wikipedia.org/wiki/Jacques_Chirac
So what happens if the Concorde hits Chirac's 747 and Chirac is killed? His immediate constitutional successor is Senate President Christian Poncelet.
https://en.wikipedia.org/wiki/Christian_Poncelet A snap election is held. Let's assume that Juppé and Jospin are the candidates. Whoever wins, it sets up an alternative sequence of presidential elections--2005, 2010, 2015, etc. Any thoughts about how these will go?
(Techincally speaking, the change from seven to five year terms was not decided on until September 2000.
https://www.brookings.edu/articles/frances-new-five-year-presidential-term/ However, by July 2000, it had strong popular support, and Chirac himself had agreed to it, and I assume it still goes through.)