1.
1994-95 WCF vs. Houston Rockets
This one hurt so damn much. The Spurs lose the first two games at home. Fight back and win the next two at home. Everything is looking good ... but then lose Game 5 at home and Game 6 on the road. Spurs had never won the championship before so getting that close and not doing it was damn tough to swallow.
2.
2005-06 WCSF vs. Dallas Mavericks
This one was bad. The only reason I don't think it's worse than the '95 loss is because the Spurs have three les to their name. That said, if the Spurs win Game 7 at home, I think they go on to win the championship. Phoenix?

Spurs owned them last season with Amare. Detroit looks beatable with Flip at the helm.
3.
2003-04 WCSF vs. Los Angeles Lakers
.4 sucked. It really sucked. But going into that series, I thought the Lakers were the better team on paper. The Spurs were going to have to play perfect to beat them. As it turns out, they played great the first two games and then folded.
4.
2000-01 WCF vs. Los Angeles Lakers
That azz beating was just wrong.
5.
1978-79 ECF vs. Washington Bullets
Going up 3-1 and then dropping three in a row had to suck.