Principle: Consent is free when it is not caused by coercion, undue influence, fraud, misrepresentation, or mistake. When consent is caused by coercion, the agreement is voidable at the option of the party whose consent was so caused.
Facts: 'X' threatens to gun down 'Y' if 'Y' does not sell his property worth Rs. 20,00,000 for Rs. 1,00,000. 'Y' agrees to sell.