crazy, insane, mad, nuts (asserting that something is out of place in the head); rash, risky, imprudent; tremendous, terrific, huge, enormous; malfunctioning, broken and working incorrectly (said of a machine); overgrown, rambling
Crazy people and children tell the truth, meaning they have no inhibition to express how they see things. Compare both in vino veritas and out of the mouths of babes.
madness, craziness; an act of madness (i.e., an act based on a lack of judgement or reasoning; an act causing surprise due to its anomalous nature); nuts, crazy, insane (translatable as an interjection)