I Wondered How Long It Would Be...

Before this was attempted. From the Associated Press:

After being tipped by an acquaintance of Derrick Shareef, the FBI says it taped the 22-year-old planning to use hand grenades to blow garbage cans into clouds of flying shrapnel in a crowded mall the Friday before Christmas.

I have envisioned this way before this story was released. As a matter of fact, the day of the September 11th, 2001 attacks, I told my wife that malls would be the next target. However, I expected small timed bombs scattered all over a mall rather than grenades.

Rookie. {sarcasm}