Little Brother just came sleepily down the stairs and got in my lap.
"Did you hear a funny noise just before, Mom?"
"What kind of noise?"
"A weird kind of noise."
"You mean when Daddy dropped a bunch of stuff in the bathroom?"
"No, not THAT noise. A noise that sounded like this: ssshhhhhhhh."
I thought about it for a minute, then remembered:
"OH! That was the street-sweeper machine going by! That must have been what you heard!"
I thought he'd be happy to know I figured it out. But he just looked at me seriously and said, "I thought it was an alien ship."
Oh well. Maybe next time!