I get hit by the a grain of space dust, which isn't big enough to destroy me, but changes my trajectory so that I avoid the bigger asteroid.

 

The user below has eaten a time bomb.

I cut the green wire, and throw it back at @Qwert_Yuiop with just seconds on the clock!

The next user is actually Dolan.

Well because there was no 'attack' I'm still alive (yay)

the next user (ordinary human) uses cryogenic freezing to go into the future, unfortunatly when they wake up all humanity has been destroyed by a nuclear war. You are exposed to 1000 times the leathal dosage of radiation with no protection. Even if you magically survive there is nowhere to recieve medical treatment.

Fortunately, I come out of the cryogenic freezer ten years after the nuclear war, meaning that most of the radioactive fallout has already decayed. As a result, there are no high radiation areas remaining to cause harm.

 

The next user is exposed to the nuclear fallout, while it is fresh and highly radioactive.

Im a stone. duh!

 

 

The next user is the worst noob at AOE2 and is being clubbed by a pro gang.

And the server collapses. (AOE2 is some sort of MMO I guess)

 

 

The next player is inside a rocket, which is heading for an impact with the moon at an immense speed and without any fuel.

There is always an emergency parachute that slows down speed. I activate the parachute before crashing, and safely land on the moon.

 

The next user is on the moon, with no spaceship to return to earth, there is 0.000000000000000000000000001 percent of oxygen left in the air can(one brath available)and no more anywhere. (next user is a HUMAN which needs oxygen to live.)

After my last breath, I press the air rejuvenation button on my suit, which refills my oxygen (the suit has infinite air inside it, because I have something in it called the quantum storage device, which can store infinite anything.)

 

The next player has a heart attack while taking a crap (lol).

Because putting the word "quantum" in front of anything makes it all science-y and therefore automatically true.

Anyhow...fortunately, I'm a Time Lord. I have a spare.

The next user has all their vital organs ripped out of their body and burned.

After my last word, I disappear forever until god has set his, course on my soul to be recarnated into a human teenage boy fighting for his life.

 

The next user finds out he/she has terminal cancer.