The parallel full hybrid system developed by Porsche also offers "coasting" at higher speeds, a mode wherein the internal combustion engine is turned off and the electric motors use vehicle momentum to generate electricity that is stored in the lithium-ion battery.
Porsche's Stability Management system will grab a caliper or two to keep the car from gliding off into the weeds tail-end first (remember, that water-cooled 911 motor sits behind the cockpit).