Irony of Miles Confiding in Mannie
After Wilma visits him with her concerns about her Uncle Ira, Miles calls Mannie for help and then includes him in every aspect of their journey of terrifying discoveries. The irony of this is that Mannie had already become "the enemy" the day before Miles had contacted him, and therefore had the benefit of day-to-day updates from Miles that enabled him to be one step ahead of the foursome from the start.
Irony of the Professor's View on the Pods
The Professor in trying to misdirect Miles with his information claims that the extra-terrestrial does not have the ability to think, or plot an invasion, but rather migrate to survivable planets organically. This situation is ironic ironic firstly because the Professor is already a pod recreation of his former self, but also because the pods leave Mill Valley and migrate back into space when their attempts to overpower California meet resistance suggesting conscious decision making abilities.
Irony of Mannie's Claims of Not Hurting Miles
Mannie believes that being overpowered by the pod was not going to hurt Miles and Becky. This situation is ironic because the process removes all ability to feel emotions or demonstrate love, and it is essentially an act or a murder, and also ironic because Mannie, lacking the ability to feel emotions, is no longer qualified to judge how something might feel.
Irony of Looking Like a Vacation Resort Advertisement
Miles observes to the reader that Becky looks like a girl in an advertisement for a vacation resort because his white shirt with the sleeves rolled up in a jaunty fashion and his jeans looked delightfully casual. Such a setup made Becky seem ready for a lovely day outdoors without a care in the world, a stroke of irony since she was amidst the most stressful and terrifying course of events in her life.
Irony of Comparing Himself to a Silent Comedy Actor
Miles says that the four are running around like actors in a silent comedy. His statement is ironic because the situation they find themselves in is anything but comedic and is actually more of a tragedy than a comedy.