11.   Very appreciative after we helped him change his flat tire.

12.   He upended the bicycle to fix its flat tire.

13.   We had a flat tire on the highway but fortunately a Good Samaritan stopped to help us change it.

14.   Along the way the group had all manner of encounters, including those with cowboys and Indians, flat tires and horses that went clop in the night.

15.   Also on the market are puncture sealants that can be injected into a flat tire through the air valve.

16.   Although standard tires quickly fall off the wheel rim when deflated, the new beads keep a flat tire on the rim, even during severe cornering.

17.   And the thugs are laughing and making fun of your flat tires.

18.   And then there was the day that Sally Jessy Raphael pulled up in a limousine with a flat tire.

19.   And there is the time your car gets a flat tire on some remote stretch of highway and you reach into the glove compartment for your cellular telephone.

20.   Apart from a few flat tires, which Singh fixed himself, the cost of the trip has been small, Singh said.