That if you spot a dish running away with the spoon, it is definitely time to check what you're drinking and/or where your mushrooms come from.
That if your name is Jack and you come across a really tall plant, turn around, pretend you didn't see it and walk away fast. Under no circumstances climb the thing unless you actually want to fight a giant. (If you do want to fight a giant, it's probably time to seek medical help - it's not exactly a normal wish is it?).
That if you're newly married and your husband tells you not to go into a certain room or open a certain door, get out of there fast. It isn't mountains of paperwork he's keeping stashed in there!