i guess it was when i first started playing back in 1998 3rd edition had just hit the scene, i picked the only army that was collecting dust on the shelf (sisters of battle).
my 2nd game ever was a breakthrough mission against dark eldar. he had Cheese lord! a close combat monster from the bowls of power gamer hell
per the codex he went first and creamed my sisters before thry could leave the deployment zone. save for one 10 model squad of seraphim and a canoness i had tucked at the back. Cheese Lord! was in HtH with my canoness and she was doing pretty good until i had rolled a 1 on her last invulnerable save. So as any self-respecting dark eldar player would do, he dida sweeping advance right into my squad of seraphim which hadn't moved at all. and could rapid fire their bolt pistols at 6 inches. and reroll misses.
20 shots hit in all and wounded with 6s all around.
since he had me roll every single armour save throughout the game(even after the first hit had killed the model) i made him roll every single hit on that damn shadow/void/take-whatever-you-got-and-laugh-at-you shield..... 20 1s really does make you wince even when your not the one rolling