Here is the shot that I went with:
Gondry went to great extents to visualize the tenuous nature of memories and dreams. In this shot, from earlier in the film, Joel is getting a memory erased from just a moment before the procedure began. The way Gondry disorients the viewer, keeping the background out of focus, is very disturbing - we are still in the film's first half hour and are not yet acclimated to the film's visual style. I remember the suffocating feeling I had when I first saw this sequence, the way it makes you try and force your eyes to see things that can't be seen. It's an inspired stroke and an incredible example of visual storytelling. As the film continues, his techniques become less severe and his choices have more of a charming flourish. Baby Joel being bathed in the sink, characters and objects disappearing in front of our eyes, etc; but this moment is the one that begins the process and it's the most effective, I find. Gondry never really capitalized on the promise of Eternal Sunshine (not that Kaufman fared much better; his next film, his directorial debut, Synechdoche, New York was a brilliant deconstruction on the misery of life, but it was never truly understood in its time and became a rather large failure that he still hasn't truly recovered from), but his work in this film showed what he was capable when provided with the right material.
One can spend their entire life finding great things within Eternal Sunshine of the Spotless Mind. It's a masterpiece of melancholia and romance, both funny and heartbreaking. Like all great films, it changes with each viewing. Different shots take on different connotations at different points of your life. I did not expect to choose a shot from the "McRomance!" sequence in the movie, but alas, it's a sign of this movie's greatness that it keeps on surprising me.