Haha, it's a running joke in our family that American cars are made from TNT. Cars on British TV just crash, they don't explode.
I thought the same thing when that rocket slowly tipped over and still completely self-destructed. I understand rocket fuel is volatile, but wow.
Are we sure those are not intentionally/automatically triggered explosions?
The grasshopper flight that flipped sideways then exploded was blown up by the flight termination system. The rest of them are just pressurized tanks of propellant rupturing in the presence of fire and/or red-hot metal.