You might think that standard villanous doctrine would hide all of the vital systems and nerve centres of their secret lairs and complexes away somewhere safe and secure. This is wrong.

Always have vital systems lying around next to the most likely battle locations, so that you have good targets for critical misses in combat.

Transcript

Obi-Wan: This whole tragedy was preventable. All of it.
Obi-Wan: If only you had mastered your passion, you could have been a respected Jedi Master.
Anakin: What, like you?
Obi-Wan: Padmé is respected and loved by the people. You'll never know what that feels like.
Anakin: I will be loved! You'll see!
Obi-Wan: You've always been driven by jealousy.
{flashback to Anakin and Padmé talking after Shmi's funeral}
Anakin: It's all his fault she's dead! He poisoned her against me.
{end flashback}
[SFX]: Whooom!
GM: Ooh, a 1. Obi-Wan, your sword slices up a control panel.
Obi-Wan: Ooops. I hope that wasn't anything important.
GM: Only... <roll> the magmashield regulator.
Obi-Wan: I hesitate to ask.
R2-D2: It only prevented the entire facility from falling into the lava. Pretty lucky hit, really.