Advancement Scenarios: A look at the second leg of the Western Conference semifinals

FC Dallas' 1-1 draw with Seattle in the first leg of the Western Conference semifinals Sunday night gave the Sounders a slight edge heading into next Monday's second leg at CenturyLink Field. Seattle's advantage is due to the new away goals tiebreaker for this year's postseason. You can get a thorough explanation of the away goals rule and all the other intricacies of a two-leg playoff series HERE. Here are the advancement scenarios for both clubs depending on the result of the second leg:

<span style="color:#ffffff;"><u><strong>Second<br> Leg Result</strong></u></span>
<span style="color:#ffffff;"><u><strong>What It<br> Means</strong></u></span>
<span style="color:#ffffff;"><u><strong>Appropriate<br> Reaction</strong></u></span>
FC Dallas win<br> (by any margin)
FC Dallas advances
<img alt="" src="http://rack.2.mshcdn.com/media/ZgkyMDEzLzA4LzA1LzYyL2FuY2hvcm1hbi42NjJkYS5naWYKcAl0aHVtYgk4NTB4ODUwPgplCWpwZw/e36d14bd/1c0/anchorman.jpg" style="width: 200px; height: 130px;">
Seattle win<br> (by any margin)
Seattle advances
<img alt="" src="http://mashable.com/wp-content/uploads/2013/07/Dr.-Who.gif" style="width: 200px; height: 110px;">
0-0 draw
Seattle advances<br> (away goals tiebreaker)
<img alt="" src="http://replygif.net/i/272.gif" style="width: 200px; height: 163px;">
1-1 draw
Two 15-minute extra time<br> periods will be played.<br> If still tied, match will be<br> decided by penalty kick shootout.
<img alt="" src="http://i.imgur.com/S4MYFQO.gif" style="width: 200px; height: 121px;">
Any other draw<br> (2-2, 3-3, 4-4, etc.)
FC Dallas advances<br> (away goals tiebreaker)
<img alt="" src="http://stream1.gifsoup.com/view/760779/carlton-dance-o.gif" style="width: 200px; height: 149px;">