I've had this happen where after I get knocked out by a player or a zombie, my player with either A) not wake up and the game will stay on the "You are unconscious" screen for several minutes or B) when I wake up my characters will start to do this float/slide along the ground.
*Note, no I was not dying of starvation or dehydration
AMD FX(tm)-8150(8 CPUs), ~3.6GHz
8 GB DDR3
NVIDIA GeForce GTX 660 Ti
This is a duplicate report and/or the developers are already aware of this bug/problem.
Please check the feedback tracker to see if an issue exists before creating a new one and instead vote the original one up so the developers can see it's a common problem. (Most of the most popular will be up top if ordered by Priority).
You can also use the 'Filter' textbox to search through existing reports using a keyword if it's not close to the top.
A list of important bug/issues that the developers are already aware of can also be found on the DayZ Forums:
http://forums.dayzgame.com/index.php?/topic/153994-early-access-important-information-known-issues/
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I have added the original report above under ‘Relationships’
Cheers