Yale law professor Ian Ayres continues his Coursera course American Contract Law with a lecture on remedies, specifically the right to suspend performance. He walks through AMF v. McDonald's, a dispute over a contract for cash registers, using the case to show when a party can lawfully halt its own performance after the other side falls short. Ayres breaks down the reasoning courts use to decide whether a breach is serious enough to justify suspension rather than requiring the non-breaching party to keep performing while seeking damages later. The lecture is short and focused, part of a numbered sequence within the course's remedies unit, and assumes some familiarity with earlier material on breach and damages. A case file link is provided for students who want to read the underlying opinion directly.