When Oscar jumps from the bridge, he believes that is life is falling apart, mostly due to his losing the affections of Jenni Muñoz.
Yunior is fairly shocked that Jenni shows interest in Oscar at all; she is "luminous" with an incredible body and a tough "hardcore goth" vibe. Oscar decides that Jenni is the love of his life, and she seems to enjoy spending an increasing amount of time with Oscar, too. She begins reading him her poetry, and Jenni seems genuinely happy when she's with Oscar. After years of being overweight and sloppy, Oscar suddenly begins caring about his appearance more and even loses some weight.
The brief romance comes to a speedy halt when Oscar walks in to find Jenni naked with another boy. Oscar flies into a rage, tearing the posters off her walls and throwing her books around her room. He is forced to attend counseling in order to keep his housing and is forbidden from going to the second floor. Everyone views him a "some kind of major psycho."
On the night of the suicide attempt, Oscar drinks three bottles of liquor, which further impedes his judgment. After walking to the bridge, he begins reviewing all the "miserable" details of his life and sinks deeper into depression. He closes his eyes, and when he opens them, he believes he sees a "Golden Mongoose." Believing this is a sign, Oscar throws himself into the darkness below.