Butterfly Nightmares

Last night before bed I put Honeybunches' prescription cream on his belly and arms where he had the rash.  About 2 am he woke up screaming and crying.  "Mommy!  Mommy! Can I come in your bed?  I had a really bad dream.  The butterfly killed me.  It was eating me!"  He was crying and terrified.  Was this more than a coincidence?  He hasn't had nightmares that have woke him, that he's talked about, or night terrors in a few years.  I guess we'll put the cream on him tonight and see if it happens again.  He loves butterflies so much, which is what makes the dream so much more odd.  He spends most of his days trying to catch them.  He wanders off sometimes trying to catch them.