[Gammix]

https://sampwiki.blast.hk/wiki/ApplyAnimation

You have the "freeze" parameter 1, so the player will be frozen.

Also, before you run the timer, you should kill it to avoid multiple timers which can possibly be the cause of your legbreak bug.

pawn Код:

KillTimer(timerLegBreak[playerid]);
timerLegBreak[playerid] = SetTimerEx("LegBreakTimer", 2000, false, "d", playerid);