My uncle had said the same thing after I described what happened.
Like I said, it hasn't done it again, but I also have not ridden it hard. I've only started it up to ride it around to get it going every once in a while. It would need to be broken in.
Hopefully you're right and that's all it was.
Regardless, I'm still going to sell it. It's been sitting long enough in my dad's garage!