(Although, once asleep, a charging elephant couldn't wake me. [Goofy] )
You know, I used to be like that. Once, when I was a teen, a car wrapped itself around a lamppost on the road right outside my bedroom window and I managed to sleep right through the ensuing fuss, including sirens and my parents getting up and bringing over blankets etc for the driver. (Who fortunately survived pretty much unscathed.)
Several years of dealing with a hound who had a major allergy and couldn't get through a night without trying to rip his paws apart a dozen times cured me of that though! Even though we now seem to have gotten through and he's fine now, I still wake up if he so much as twitches in his sleep.
LabRat
