End of Tour de France & personal best on my bike

Last day of the Tour de France today. It's been a great 3 weeks watching it. Mark Cavendish got the Green jersey and Cadel Evans was the overall winner - first time someone from the Southern hemisphere has won the race.  Something must have rubbed off as I managed a personal best on my bike - 30miles in 97 minutes (18.5 mph). This time last year it took me 116 minutes (15.5mph)