Mick Jagger was pretty bad... BUT
The worst moment goes to seeing Matt Hasslebeck's face after his pass to Jerramy Stevens to the 2-yard line was called back for a hold. Regardless on whether or not there was a hold, this was just another among the list of (valid or not) penalties that sucked the wind out of Seattle's sails throughout the course of the game.
Shaking his head in disgust, and in disgrace, Hass throws the pick right afterwards. At that moment the Super Bowl was over... and Seattle just felt like the world was crashing down on them.
Worst moment for me in the NFL for a long time... rates up there with Philly booing Irvin's career-ending injury.