I got up this morning and went into the bathroom. The toilet was making that swooshy water sound,…

I got up this morning and went into the bathroom. The toilet was making that swooshy water sound, the one it makes when it's been flushed. On the one hand I hope that it wasn't running all night, because that would mean it might have an issue, but on the other hand I'm hoping it didn't just flush itself, because that would be creepy.