Do you mean to make a hazard for myself?
Then i will...
I eat the cookie, choke up with it, but then drink water, and I survive.
The next user is surrounded wit a wall, and cannot climb it up (you dont have such things as a ladder, etc.), and there is a 10000 ton weight hammer just about to fall directly to his/her head that will make him/her flat, and die.
Fortunately, I can simply dig under the wall and escape. In addition the dropping mechanism malfunctioned, giving me enough time to do so.
The next user has fallen into a pool of concentrated sulfuric acid, and has no method of escape or neutralizing the acid.
I am a stickman with life of 999999999 so i just walk out there before my life reaches death.
The next user gets force-fed some compressed deut.oxide and gets exposed by a huge amount of protons that can explode with deut(generally protons pass through objects so it reacts with in-body deut).
Luckily I ate an gapple just in time. (Assuming you are talking about the time lord on timeless pvp)(You are probably talking about dr who or something)
The next user is a currupted wish
since they refused to take me as a prisoner i persuade them to just let me go.
the next user is poisoned with nanomachines that rapidly consume any material and there are 2 minutes left till death. you are also naked in the middle of the desert and there is nothing but sand and air around in 10km radius.
Fortunately, a gamma ray burst strikes the Earth, creating a massive global EMP that destroyed all of the nanobots before they could cause any significant damage.
The next user is an asteroid about to crash into Jupiter.