Since you have not specified what I am, I am a lump of diamond (TPT kind, not Minecraft).

*EDIT*

I just saw Michael238's post so:

I do not have protection, I am protection.

The next user is on the Kestral (from FTL) and on 1 hull density, with fires and breaches everywhere and a deactivated MedBay and CloneBay, with no shuttles, personal teleporters or cloaking systems. All ship systems are red. Thus you have no evade, shields, or life support. Since your Piloting and Engines are destroyed you also cannot FTL jump. You are versing the Flagship, which has 14 hull remaining and all it's weapons charged. All it's systems are green. It is hostile. You are in a Rebel controlled asteroid field (wih an ASB). You are the last crewmember and on 1 HP. 

*EDIT*

There is no oxygen anywhere on your ship. The Flagship does not have any fires or breaches on it and still has all its crew.

An incredibly strong gravity void is very close to the magnetar and sucks it in. Luckily the void closes up as I travel towards the gravity void and I slam into the wall behind it, leading to mild concussion but not death.

You go back in time and accidently kill your great-great-great-great grandfather and grandmother.

@Factorial

Uhh, that doesn't exactly work, but ok... Probably work better if it were a portal to the Ancient Crystal Worlds.

From 2 billion lightyears away, leaving me millenia to move out of the way.

You think you can fly, and are in the real world. (Obviously you can't but you decide to try by jumping off the Empire State.)

The railgun's range is 1,000,000 lightyears so I am 1,000,000 lightyears and 1 metre away from the railgun, again giving me time to dodge the projectile.

You enter a one way portal to the year 100,000,000,000,000,000. Unfortunately for you, the Sun is now a white dwarf and the Earth a barren, freezing wasteland. The portal closes up behind you and you forgot a coat. In fact, you forgot all your clothes. You aren't dreaming.

*EDIT*

Just realized that everyone who posted on ths thread is a sadist.

Fortunately, it turns out that there is a black hole nearby. Thanks to the black hole's gravity, the railgun's projectile misses me, and falls into the black hole where it is destroyed.

The next user is an "atom" of positronium, which is about to self-destruct into a pair of gamma ray photons.

I live as a pair of gamma ray photons, and by chance I enter an infinite loop between a black hole and a white hole.

The next user is standing outside, naked, has no protection, is not dreaming, is in real life, in the middle of an open field, and is struck by 10000000000 amps of lightning.