Lyric discussion by imhoterror 

Cover art for That'll Be The Day lyrics by Streetlight Manifesto

Hes pissed because the person hes singing about is dead. He did all could to stop the suicide but he couldnt stop him from killing himself.

It's cool how these following three songs from Everything Goes Numb interlock with each other, each song has the same meaning but a different situation/outcome.

A Better Place, A Better Time - He wants to prevent someone from killing themself, and he sucessfuly stops them.

The Saddest Song - He wants to prevent someone from killing themself, but the person successfully kills himself, the rest of the song is about how he deals with it.

That'll be the day - The person already killed themself and he is singing about the aftermath.