The leg you suggested is AR13, Ep. 7. Here are its major tasks (not in order):
DETOUR-follow a series of power lines, keeping mark of numbered tags hanging from power lines in Nai Sarak Street, report these numbers to
power company official, plugged in musical Ganesh statue to receive next clue in New India Stationers in Chawri Bazar or find store
named Ram Bhandar in spice market, transport 40-pound bags of chili peppers to location 1/4 mile away in Shwan Kumar and Sons,
then grind them into chili powder with mortar and pestle to receive next clue
ROADBLOCK-find envelope marked "The Amazing Race" among several marked "Try Again" raised on ladders amongst celebrators of Holi, Festival of colours, while being bombarded with traditional colored dyes and water
GENERAL-Speed Bump task required Ken & Tina to serve holy water to hundreds of Sikhs at Gurdwara Sis Ganj Sahib (at site in Chandni Chowk
area of Old Delhi) until they satisfied waiting crowd
I have looked at other very short legs, but when the beginning transportation is factored in they can become very long legs. So I think that transportation is a key part. The double legs in the same city avoid that issue. Here are one worth considering:
AR12, Ep. 4 Burkina Faso near Ouagadougou
DETOUR-use traditional methods to pan for 1 ounce of gold; they can trade their gold after weighing, at nearby tent, for next clue or learn traditional local dance, perform it in front of 3 local celebrity judges, crowd of locals; teams must some of own their own dance moves; lack of creativity or bad performance will incur teams 10 minute penalty
ROADBLOCK-ride bicycle, deliver large amount of cumbersome goods, including small goat; deliver items to specific people stated in clue at nearby market
GENERAL-look for village chief, accept gift of live chicken from him, which they then had to take throughout the leg to Pit Stop
I also looked at several other double legs/same city to see if the second one was particularly short. I did not find out additional one beyond the one above.
This is a "beauty is in the eye of the beholder" judgments, as we do not have access to any filming duration information from World Race Productions.