It turned out to be the last Second Edition 40K game I ever played.
It was my generic Space Marines against my buddy's Eldar. He'd recently acquired a titan from Forge World and was fielding it against me. The game began and he went first, advancing his force across the table. He laid waste to a lot of marines, it being a mostly infantry army.
When my turn came, I had only one heavy weapon remaining. It was a lone space marine with a missile launcher. He was on an elevated position. My shooting phase began. He fired. It was the ultimate "Hail Mary" shot.
The missile struck the Eldar titan in the left shoulder. It penetrated the armor and hit an ammo magazine. The resulting explosion blew the entire titan into next Tuesday.
He conceded the game.
Then went home and threw his army in the trash.
(I'm not kidding.)
Fast forward a few years to a couple months ago. My first Apocalypse game. He (same opponent!) was playing Dark Angels and I had Black Templars. I got the initiative and took my turn. One of my assets was an orbital strike which, naturally, I aimed at his super heavy tank that was the centerpiece of his army. (It wasn't the template one, it was the one where you randomly choose a super heavy and that was the only one on the table.) The hit struck the tank and blew the main gun off. At the same time my army executed a pincer and the resulting assaults from my land raiders, along with shooting, claimed one of his Land Raiders, a Predator, a dreadnought and several marines.
He conceded the game at the end of my first turn.