So without clicking the link it is safe to assume this is his reaction to UW's win over USC? Because that was kind of a big deal, and this would be his senior year right now.
Yes. He was at the game, down on the track (presumably with the band and other UW Athletics VIPs). He kinda did a shoulder bump with Nate Robinson, and ran around a bit exhorting the crowd. If you hadn't known it was Spencer, you'd have figured it was some tall guy who was happy about Washington winning.
Honestly, the thread title should be changed to something like: "Spencer Hawes is happy UW defeats USC". There's nothing to see here.