It actually means people in great depression becomes happy.
Jade, " Hey dude!"
Tori, "wassup?"
Jade, "I got dumped by beck, and I need a non-concentrated emotional rebuildation now."
Tori, "Fuck my life, ofc he dumped you, I'm his gf now, fuck off loser."
Jade killed Tori and commit suicide, the non-concentrated emotional rebuildation isn't completed.