If you could go back in time to undo one thing what would it be?

Terminator style, what would you prevent from happening?

invention of speakerphones, the completion duke nukem forever, buying wii music?

p.s. saying "this thread" will just display you lack creativity.

wow really? not cool bud.

Uh...
 
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Kill certain peoples parents before they gave birth to those cute little failures of life.

Aw come on, you all know who you are

Prevent one thing?  My own stupidity...numerous times. 

The invention of the wheel...just to fuck with people.

id rescue Jesus from cross, so we would have people banging on for 2000 year about how he 'died for our sin' and i would have to buy a chocolate egg every year

Prevent one thing?  My own stupidity...numerous times. 

I would go back to that morning where I smoked a whole joint on an empty stomach before a school dance when I was 16. 

id rescue Jesus from cross, so we would have people banging on for 2000 year about how he 'died for our sin' and i would have to buy a chocolate egg every year

On a serious note, prevent 9/11 or other avoidable mass deaths and other world problems. Also, prevent one family friend of mine who was severely injured and is all but crippled for the rest of his life from getting injured in the first place. On a less serious note, make sure that The Beach Boys finish and release SMiLE in 1967 like they were supposed to.

I don't ever wanna screw with the past. Unless I get to relieve my life with all the knowledge I have now, which would be kind of totally awesome, I do not want to go back in time!

I might want to go back and tell my high school self "Hey dumbass, you might want to start giving a shit or you're going to wind up going to a God-awful state school in four years." but then I might not have had as much fun in high school. Not that I had much of a social life until junior year, but still, I don't know if I would've preferred hanging with the smart kids to the scumbags/stoners/normal kids I hung out with.