I think fallling unconscious sounds like a good idea.
Isn't that the creature from the predator movies? Under the scenario that it has come to kill me (not to sit down and have a cup of tea)
I think most of the villians (like freddy kroger from nightmare on elm street) in horror movies prey off fear. When you are unconscious, that is basically as good as being dead (the vital parts of your body are working, but your mind is beyond sleep - say if you were to passout from dehydration or faint from exhaustion).
You are totally unaware of the creature, and anything else for that matter. I would hope such a creature would not bend over a sleeping body and pluck its heart out (there is no fear for it to prey on, and the person is incapcitated). Nor would it wait around 30 minutes for the person to wake up.
Heck, it might assume that you hit your head when you fell to the bathroom floor, and you'll bleed to death in 10 minutes anyway.
Of course I'm not necessarily sure you can force yourself to black out (not being the natural reaction) - but as long as it doesn't know I am acting and faking dead like a dog can, it might not matter
I would wait there motionless until long after it is gone.
If you dart for your magnum, he might snatch your heart out before you can get to it (it's probably much faster than you, and would grab you by your back as you attempted to run for the gun safe)