Fix a tire

[deorman]

http://dirtbike.off-road.com

[Gizmo]

Used to wrap a few inches of duct tape wrapped around my tire iron for just that kind of stuff. a couple layers of the silver stuff would keep the tube from poking out of a damaged tire and other stuff from poking in, at least to get you home. If the tire was damaged more than that it was time to replace it ASAP.
Gizmo

[gcrank1]

FWIW, the 'Gorilla Tape' version is way stronger than the common silver stuff too, might be a better bet if you can scare up a bud with some so you dont have to buy a whole roll (I'll give you a few 'wraps' if ya come over.....) .