Seems like the Tesla have many issues including insufficient armour underneath protecting the battery from road debris. Let's hope that these issues have been rectified though a spontaneous fire in the back seat sounds like an excuse. What if there are potholes? A few incidents that led to a Tesla fire.
"Debris on road punctures battery." "Spontaneous fire in back seat." "Tesla's burn at charging station." "Car charging and then ignites." "Tesla spontaneously catches fire at stop light."