GENERAL KNOWLEDGE: Which every day item has an inertia wheel?

Questions

Category: Quantum Leap: "The Leap Home, Pt 2", takes place during this war, where Sam's brother dies.?

Category: "Why, I guess you don't know everything about women yet"?

Category: "Our love is God, let's go get a Slushie."?

Category: "It's beautiful: Pigeons fly, women fall from the sky! I'm moving here!"?

Category: "Death Therapy, Bob. It's a guaranteed cure."?