I find it believable that Mark could have written that anonymous letter.
Depends what he is drowning in ? Could be many things.
drowning
Go get laid.
Opposites could include believable, credible, creditable, acceptable, likely, or plausible.
While most lifeboats filled with survivors put distance between themselves and the sinking ship, Lifeboat 14 went back and rescued some of the survivors who were in the ocean. Going back to rescue survivors in the water posed a significant risk to the occupants of the lifeboat, as the masses of survivors drowning in the water could overcome the lifeboat and drown everyone. As a result, the leader of the lifeboat, a man named Harold Lowe, decided to wait until the screams of those drowning had grown quiet before going to rescue what few survivors they could. They eventually pulled 4 people out of the icy water, one of whom died soon after. Lifeboat 14 was reportedly the only lifeboat that went back to rescue survivors.
We have no idea since you didn't say what "it" might be - could be anything!
It has heat, and sound sensors to see if there are any live living bodies, the rescue robot could rescue.
If you happen to fall into a body of water (or if someone throws you in) while you are asleep, then yes, you could wake up drowning. This doesn't happen very often.
Could it be "You me at six & Chiddy - Rescue me" ?You Me At Six & Chiddy - Rescue Me You Me At Six & Chiddy - Rescue Me
of Drown
In a way, yes, if there is not enough oxygen getting to it, and there is an excess of non-vital fluids in your bloodstream, your brain could be considered as drowning. Alternatively, if you are inhaling gas that is not oxygen, or another fluid that is not oxygen, your brain could be considered as drowning.