Its possible to get the player stuck if using playAction and the player performs the given steps
(check YT video to get it more clear)
http://youtu.be/bTho8rWb2H8
how bug was found:
i tried to force the player to a specific stance when a specific variable was at a specific value
ExampleScript:
this addEventHandler["AnimChanged",
{
if((_this select 1) == "AmovPercMrunSrasWrflDf") then
{
(_this select 0) playActionNow "PlayerProne";
};
}];