The Tower: what falls because it was badly held up
major arcana

Why arcanum sixteen frightens more than it deserves, what it actually tends to describe and how to read it without announcing disasters.
The Tower is the card most people have seen in a film before seeing it in a deck, and that drags along a catastrophe reading that doesn't hold up in practice. The image is a tall building struck by lightning, with two figures falling and the crown knocked off. What it usually narrates is the collapse of a structure that already had cracks and was standing out of habit.
Upright, it appears when something comes down all at once after holding on for a long time. A tacit agreement that breaks, a version of yourself that stops working, a job that ends without warning. The uncomfortable part is the speed, not the fact itself: there is almost always prior information that someone chose not to look at. The crown falling from the roof is read as the idea you had of the situation, not the situation.
Reading it as announced misfortune is the most common error and also the easiest to avoid. In a spread, the Tower describes a movement, not a punishment, and it never says when or to whom. If it comes up in the obstacle position, it usually signals that what holds you back is propping up something that no longer stands on its own.
Reversed, the two usual readings are the collapse that is being postponed and the collapse that already happened and is still being cleared up. The first appears when there is an enormous expenditure of energy keeping something upright. The second, when the spread looks backwards. In both cases the card loses its sudden character and gains slowness.
Next to Pentacles it usually touches the material and the everyday: housing, employment, household finances. Next to Cups, a bond changing shape. With Swords around, the collapse has to do with an idea, a belief or a conversation that can no longer be avoided.
If it comes up and frightens you, the useful response is to describe it out loud without using the word disaster. That forces you to look at which concrete structure is at stake, and almost always it turns out you had already identified it.