What is that in the sky? It's a bird, it's a plane, it's a T-Mobile commercial! Between noon and 1:30p.m. this afternoon 100 skydivers will fall through the skies of San Francisco in hopes of forming a 'T' in midair. The jumpers will be in costume and plan to land at various sites throughout the city. Weather permitting, jumpers taking part plan to land at Justin Herman Plaza, Marina Green, Moscone Playground and on the roof os a Pier 39 parking garage.

Just before the jump, at 11:15 a.m. there will be a skywriter as well as a fly by from the Patriots Jet Demonstration Team at 12:10 p.m. along the Embarcadero. The city is being paid almost $20,000 for allowing T-Mobile to pull this aerial stunt.