What would you do if...?

I would break a hammer and use the shards to kill the computer and all related apparatuses

You don't seem to get the game.

WWYDI: Stephen Hawking was a ninja mech warrior with a carebear side-kick attacking your city at this very moment.

Pull out the batteries.

WWYDI: Happily sound asleep in your bed, you are awakened by the crashing sound of a nuclear bomb falling through your ceiling. <.<

Block it with my magic.

WWYDI: I was in your bed right NOW!

Spoiler:

I'd wink. Suggestively. And smile.

... What? Stop looking at me like that.

WWYDI I gave you some banana chips?

Exchange them for money at a monkey casino.

WWYDI: You discovered that I, rather than being who I claim to be, are actually one of your parents, pretending to be someone else as to be able to keep an eye on your online shenanigans.

Personally I'd be really pissed off.
WWYDI: We ended up as roomates?

I don't know. and I don't really care right now.

What would you do if...
...the old Civilizations games (1,2,3) became popular again?

I wouldn't care.

What would you do if if I was behind you with a giant sword.

I'd bust a cap in you quickly with my .357 Magnum.

WWYDI I suddenly walked in your house asked for food, ate all of it, then left?

Be like "Eh, whatever" and buy some more.
WWYDI I dropped the F-bomb on you?

I would use some impossible karate move and kick it back at you before it exploded.

What would you do if pandas ruled the earth.

I'd rebel against them and drop a few F-Bombs on their heads.

I'd do nothing.

WWYDI you led a double life?

Enjoy every last moment of it, as after all, we only get to live our lives, in my case, twice.

WWYDI; If you discovered, by way of someone travelling back to the past to try to kill you (and obviously failing, else you'd be dead), that in 10 years time, you'll become an evil villainous genius that destroys half the world in some bizarre way involving.. cake.

Be like, "Wtf?" and not be that genius person.
WWYDI you lost all your money and your computer exploded?

I would not be typing this right now because my computer would be destroyed.

What would you do if you found a genie offering 4 wishes.

Ask for $1,000,000,000/month income, a nuke launch-silo, spaceship parts, 6 more wishes, a Warp-Drive, PPCs, PPLs, an iPod touch (improved), a G1, and an iPhone.

I would check to see if I was blind because I seem to not see anything...

What would you do if you were trapped in a lamp and had to grant four wishes to random people who rubbed your home over the years.

I would grant wishes then when the last four ran up..... They would be the new genie

WWYDI you were on a plane and a terrorist tried to take over