The reference here to a bilingual man suffocating in a prairie motel while colored lights flash outside his window clearly evokes Kinbote, a bilingual man who said in the Foreword that he’d fled to a motel somewhere out west so that he could finish his Commentary on “Pale Fire” and who referenced the colored lights outside his window several times. There are a couple things to notice about this reference. First, it suggests that Kinbote dies in his motel—there will be many hints throughout the novel that Kinbote is suicidal and that he probably kills himself after finishing his work on “Pale Fire.” Second, in the timeline of the novel, it is odd—prophetic, even—for Shade to make this reference. After all, Shade wrote this canto just before his death in July, while Kinbote would not decamp for the western motel until August (and he explicitly says in the Commentary that he never told Shade of his vacation plans). Furthermore, Kinbote doesn’t finish his Foreword—the last part of his manuscript—until October, so that’s the earliest that he could plausibly die. Shade, then, seems to be predicting in July—with remarkable specificity—Kinbote’s fate a few months down the road. Scholars have explained this and other similar prophetic moments in the poem “Pale Fire” a few different ways. Some people believe that Shade is an invention of Kinbote’s (and therefore Kinbote wrote the poem
and the Commentary, which would explain how the poem predicts Kinbote’s fate). Others believe that Kinbote is an invention of Shade’s. Still others think that this is Nabokov inserting his presence into the book to show that he is the master of his characters and the unifying thread between the poem and Commentary. A fourth theory—one that Nabokov scholars actually consider quite credible—is that moments like this reveal that Shade was writing “Pale Fire” under the unconscious influence of his dead family members who, from a mysterious afterlife, know both his and Kinbote’s fates and are guiding him through his literary masterpiece before his death. (For more on this, see Brian Boyd’s book
Nabokov’s Pale Fire: the Magic of Artistic Discovery.)