ive carried my sisters to school and peoples houses on a regualr basis.
I recently broke my bike pump while out riding some single track, so i fixed it with a balloon and about 6 inches of duct tape...my back pack has lots of things in it haha. but i was pumping my tire up on the trail and noticed that i couldnt get any pressure, because the cap on the end was cracked, so i wrapped the balloon through the hole a few times as tight as i could get it, then wrapped it in some duct tape, and cut the balloon off. it works well now, but ive got a new one on its way already. i was pretty impressed with my handy man ness...
ive also fixed a flat with duct tape, but it didnt work very well, i had to stop and pump it up every 10 minutes or so. got me home though.
steve