You know how in action movies cars will explode if you stare at them long enough? That's not how it works in real life. Even setting the car on fire doesn't do it. You just stand there watching the guy who blocked your driveway's car burn.
Driving over 150 mph into another car, however, will result in a massive fireball, as evidenced in this jaw-dropping video of Greek shipping heir George Vakakis crashing his Porsche into a parked car. Four people died instantly: the driver, his passenger, and the woman and child in the other vehicle.