That's a haunting and thought-provoking topic! Here are some memorable last words from notorious criminals that you might want to include in your list:

1. **Gary Gilmore** - "Let's do it." These were Gilmore's last words before he was executed by firing squad in 1977, later inspiring Nike's famous slogan "Just do it."

2. **Carl Panzram** - "Hurry it up, you Hoosier bastard! I could kill ten men while you're fooling around!" Panzram, a serial killer and rapist, expressed his impatience before his execution in 1930.

3. **George Appel** - "Well, gentlemen, you are about to see a baked Appel." Appel made this pun moments before his execution in the electric chair in 1928.

4. **Peter Kürten** - Known as the "Vampire of Düsseldorf," Kürten's last words before his execution in 1931 were: "Tell me. After my head has been chopped off, will I still be able to hear, at least for a moment, the sound of my own blood gushing from the stump of my neck? That would be a pleasure to end all pleasures."

5. **John Wayne Gacy** - The notorious serial killer and clown's final words before his execution in 1994 were reportedly: "Kiss my ass."

6. **Thomas J. Grasso** - Executed in 1995, Grasso used his final statement to complain about his last meal: "I did not get my Spaghetti-O's, I got spaghetti. I want the press to know this."

These final statements offer a chilling glimpse into the minds of these criminals. Do any of these quotes stand out to you for your countdown, or are there other elements you'd like to highlight in your video?