For anger:
* A volcano erupting: This implies a powerful, uncontrolled release of emotion.
* A raging storm: This conveys the intensity and chaos of the anger.
* A caged beast: This emphasizes the feeling of being trapped and unable to control the anger.
For insanity:
* A ship lost at sea: This conveys a sense of being adrift and directionless.
* A shattered mirror: This implies a fractured and fragmented mind.
* A whirlwind of thoughts: This illustrates the overwhelming and disorienting nature of madness.
For passion:
* A burning fire: This conveys the intensity and consuming nature of passion.
* A raging torrent: This implies an unstoppable force of emotion.
* A wild dance: This suggests a lively and chaotic energy.
For foolishness:
* A blindfolded man: This implies a lack of awareness or understanding.
* A headless chicken: This suggests a lack of direction and purpose.
* A balloon filled with hot air: This emphasizes the lack of substance and the potential for collapse.
The best metaphor for "mad" will depend on the specific context and the particular shade of meaning you want to convey.