Which transformer was it?

Many months ago, my husband and I were woken up to a couple of loud bangs and flashing lights in the middle of the night.  We were both scared stiff because it was exactly what I expected gun shots to sound like.  It sounded like it was right outside our house, too!  It turned out to be an exploding transformer on the hill above our house.  But, I told that story numerous times to people asking if they'd heard the bangs.

Fast forward to now...many months later...after having never spoken of the exploding transformers for ages.  Big says to me, "Mommy, we had a transformer explode above our house, right?"

I said, "Yep!  Good memory!"

He said, "Which transformer was it, mommy?"

I said, "The one up the hill."

He thought a little longer and asked again, "But which transformer was it, mommy?"

I didn't really know where he was going with that so I asked, "I'm not sure what you're asking, buddy?"

So he said, "Was it Optimus Prime or Megatron that exploded above our house??"

Oh, to be a fly on the wall of that little brain!!