In a small village, I spent the afternoon making new rim-protection out of the broken Australian puncture free tube (it took hours with a scissor to cut it the right size). And being short on tubes, I also patched the perforated patches on old tubes - normally this would be a fairly hopeless effort (especially riding a heavy bike) but being in the middle of nowhere with little chance of finding new tubes, I had to get the most out of what I had....