In the foreground, a figure of don Quixote whose hollow head includes his own figure before a (kind of) windmill with bones as sails.
Above, an errant knight on horseback attacking an oniric figure (don Quixote imagined by himself attacking the giant; notice the arms/bones/sails like the ones of the windmills underneath).
In the background, don Quixote and Rocinante hit by the windmill sail while Sancho gesticulates.
Notice the details in don Quixote's neck: hybrid figures, monsters...
Highly suggestive illustration.