Arma 2 Fast Rope Script

BTC_fast_rope =
{
	_unit = _this select 0;
	hint "roping down";
	_veh = vehicle _unit;
	_unit action ["getOut",vehicle _unit];
	_unit setPos (_veh modelToWorld [2,1,-2]);
	unassignVehicle _unit;
	_unit switchMove "LadderRifleStatic";
	_unit setDir (getDir _veh - 90);
	WaitUntil {!Alive _unit || (((getPos _unit) select 2) < 1.5)};
	if (!Alive _unit && (((getPos _veh) select 2) < BTC_fast_rope_h) && speed _veh < 5) then
	{
		_unit setVelocity [0,0,0];
		_unit playMove "LadderRifleDownOff";
		if !(isPlayer _unit) then {_unit move [((getPos _unit) select 0) + 3,((getPos _unit) select 1) + 3,0];};
	};
	if (((getPos _veh) select 2) > BTC_fast_rope_h) then {hint "The chopper flied away! The rope has been cut!";};
};