Relax Breath of Solution.

The following example shows how you can explode specific wedges in a PieChart control when the user clicks an item in the chart.

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
layout="vertical"
verticalAlign="middle"
backgroundColor="white">

<mx:Script>
<![CDATA[
import mx.charts.events.ChartItemEvent;

private function pieChart_itemClick(evt:ChartItemEvent):void
{
	var arr:Array = [];
	arr[evt.hitData.chartItem.index] = 0.2;
	pieSeries.perWedgeExplodeRadius = arr;
}
]]>
</mx:Script>

<mx:XML id="dp">
<products>
	<product label="Product 1" data="3" />
	<product label="Product 2" data="1" />
	<product label="Product 3" data="4" />
	<product label="Product 4" data="1" />
	<product label="Product 5" data="5" />
	<product label="Product 6" data="9" />
</products>
</mx:XML>

<mx:PieChart id="pieChart"
	dataProvider="{dp.product}"
	selectionMode="single"
	showDataTips="true"
	itemClick="pieChart_itemClick(event);"
	height="250"
	width="100%">

<mx:series>
<mx:PieSeries id="pieSeries" field="@data">
<mx:stroke>
	<mx:Stroke color="black" weight="0" />
</mx:stroke>

<mx:filters>
<mx:Array />
</mx:filters>
</mx:PieSeries>
</mx:series>
</mx:PieChart>

</mx:Application>