[Freeswitch-users] What is so dangeres in "freeswitch.msleep()" in LUA?

Hi All, According to: http://wiki.freeswitch.org/wiki/Mod_lua#freeswitch.msleep It is not good to use: "freeswitch.msleep()" in session-based script: NOTE: Do not use this on a session-based script or bad things will happen. Can anyone explain please why not and what does author mean with "session-based script". I want to use it inside some function between I originate session and hangup it in the following way: repeat -- os.execute("sleep 1"); freeswitch.msleep(1000); until ((not new_session:ready() == true) or (new_session:getVariable("fax_result_code") >= "0")) new_session:hangup(); Is it danger for me to use this?