UIFOs won't be the only thing zooming in the skies above this week.Those window-ratting Harlem Globetrotters of the skies, the Blue Angels, will fly above SF for four afternoons: practice flights on Thursday and Friday, and show performances on Saturday and Sunday.

The six famous F/A-18 Hornet jets of the Blue Angels will unnerve you with five hours of practicing at the end of the work week, celebrating Fleet Week. Fleet Week, by the way, is when the U.S. Navy, U.S. Marine Corps, and U.S. Coast Guard dock in a variety of major cities for one week, hitting up said cities watering holes, tourist attractions, and ladies. The Blue Angels, the Chronicle points out, were "organized by legendary Adm. Chester Nimitz [and] have been flying since 1946. Each jet is 56 feet long, costs $21 million and flies at about 1,400 mph, or 23 times faster than a BART train."

Go America!