Here's a deliciously cruel gem by Homebrew developer Playboy21.

TrickBrick v4 is a joke application that pretends to install 5.00m33 into the user's PSP, essentially tricking the person into thinking his (or her) PSP's been bricked.

Usage:

While the "5.00m33 installer" is running, select any of the available options. Once it "bricks," press D-pad down and triangle to return to your XMB.

Installation:

Simply copy the "Installer" folder and place it in ms0:/PSP/GAME then execute.

What's even cooler is that users of this app may also opt to add a line on their own to the text that appears on screen by editing the contents of "file.txt," which can be found in the /Installer folder.

Download: TrickBrick v4