Two 18s? I got a player in my campaign who rolled three 18s, two 17s, and a 16. On the same character. In front of witnesses.
I don't even wanna know the odds of that (Actualy, i do...)
Luck definetly exists. Luck also definetly hates me.
I know a guy who has good rolls on almost anything... he takes out stuff that needs 20s to hit, because he gets the 20s... multiple times. His characters tend to have quite high stats. He'll make untrained skillchecks that a person with training and skill focus would sweat to make. He'll get shot at by 10 people all with high skill and get missed every time. In Rifts he's the guy who tends to start with 8 bionic parts (of 2D4 possible) 4 times out of 5.
However, if he goes up against a goblin of any form, he's toast. Goblin, Hobgoblin, Goblinkin, Undead Goblin, Celestial Goblin, Blind Goblin, you name it. He breaks his weapons, looses them, kills his own teammates with missed shots, gets critical hit on, gets hit by a blind, dead, dizzy, drunk goblin throwing a bannana, you name it. One time he had a +5 sword of goblin slaying made at much cost to him... In the _FIRST_ round of combat with a goblin (we were fighting in the mountains) he critical fumbles and his sword flies out of his hand and down the mountainside, never to be seen again.
Tell me that guy didn't get some sort of strange powers with the dice, in exchange for a minor weakness?