What would happen if an if an Unstoppable force crashed into an unmovable object?

Well theoretically, both forces would mathematically be represented as oo, or infinite, on a theoretical level, both are of equal value, and thus both would cancel out resulting in a zero net force. If one connected to the other on an angel, you would describe the resulting force linear to the other force as oo, because it would be the cos or sin of whatever the angel multiplied by infinite, which would result in infinite, so it would always be zero. That's the mathematical theory, in practice it could never be done because an infinite magnitude can't exist. All magnitude's are finite. "Unstoppable force" is not possible. Everything can be stopped given enough force.