To properly appreciate "Elf," you have to understand that the movie's director, Jon Favreau, consciously set out to make a film that simultaneously lampoons and pays homage to classic Christmas movies. As Favreau explained to Rolling Stone about reworking the original "Elf" script before directing it, "The character [of Buddy] became a bit more innocent, and the world [of the movie] became more of a pastiche of the Rankin/Bass [animated Christmas] films."
With that in mind, we get a hilarious scene in which Buddy sees the giant, shiny mall Gimbles for the first time. The scene plays like a moment out of so many holiday movies, where music swells in the background as Buddy's eyes grow wide at the sight of Gimbles. Like many holiday movie protagonists before him, Buddy rushes joyfully toward the mall, leaving all his troubles behind him.
He quickly reaches the middle of the street and is almost immediately hit by a yellow taxi. The Christmas music abruptly stops, as viewers are reminded that this is still New York City, and the road doesn't care about whatever special moment you're having if you're going to run like a maniac into oncoming traffic. To cap it off, Buddy gets up, slightly woozy from the impact, and apologizes to the taxi driver before running onward.