Scioly.org

Here is an example

Person 1 I Was walking when i fell of a cliff
Person 2 so i got my helicopter to catch you the all of a sudden i ran out of fuel
Person 3 so i got a replacement chopper and broght you to the surface when all of a sudden a hit man fired it's bullet at me
And so on

I will start

I was on my roof relaxing when all of a sudden i tripped and was falling

but then i just happened to be chillin' with superman (he was carrying me to Batman's house so that we could all have a Hokey Pokey dance party with the other super heroes) and you fell right into his arms. but he was so surprised by you falling into his arms that he didn't watch where he was going, and was about to run into a bank that had brick walls 6 feet thick!

then me(since i have superpowers) freezed a path in front of him and he started to luge down the path like a pro, but i ran out of water to keep the ice going...

So I handed Bob two buckets of water! And some of it splashed onto me!
But I hadn't realized that it was actually concentrated hydrochloric acid D:
*Yay4science*

but then with my awesome powers I suck the acid up but then it makes a hole in my stomach.........

So I quickly sew it up with my yarn using knitting needles. But then a piano begins falling from the sky... (randomness, but I have brain block. xD)

But I use my laser vision to burn the piano. But it ends up that there was a mirror hidden inside the piano and the laser is coming back at me!

i super-lightning-quick give you my reflective sunglasses, and the laser somehow just bounces away (heck, i don't even own reflective sunglasses )
suddenly, it starts raining liquid mercury (somehow only on me)

I look around, find someone who is on their way to work as a hotel maid, steal their sponge, and place it above your head. Unfortuanly, that maid also happened to be a serial killer, and was now pulling a gun on me.

Then my friend, wearing a bullet proof vest, stepped out of nowhere and took the bullet for you. Then him and I had a race to the top of the empire building and me being the klutz I am couldn't stop and ran off the edge of the building...