while driving on lake shore drive in Chicago 2 years ago this weekedn actually...
i hear a screaming sound like an indy car and ZOOM past me flew 2 bikes each with a passenger (chick i think) on the back.
i was going @ least 55 and from the time i heard the sound to the time they were too far away to see was about 1.5 SECONDS.
my buddy in the car was as freaked out as i was. we were both on our cell phones with our gf's and they said "what the f*** was that?"
he's a police auxillary and we guessed their speed above 150mph.
BTW this was about 11PM at night in the dark with TONS of traffic (due to the holiday)