The children find the suicide note under the "Complete Encyclopedia Of Nouns" on the desk, but when Klaus goes to decode the note, he takes that book off the shelf along with its verb counterpart.
When the house starts to break apart, a photo is stuck on the triangle shard of glass. When Klaus flips backwards, the photo is no longer visible. But after Klaus slides toward the window, the photo is in place again.
When Lemony Snicket is explaining the weather and tourism at Lake Lachrymose, he puts a sunshine, fresh air and smoked mackerel magnet on the weather board. Their positions change and move in each following shot.