Fixing Punctures / Puncture Repair / Exploding Tubes

Compressed air canisters are definitely out there - one makes up the butt of an air rifle of mine, for instance* - ~200bar in fact. The difficulty would be building the charging/regulating kit for application to tyres.

*an FX Verminator, airgunfanz. I prefer my Theoben Evolution though.

Yeah...I wouldn't trust a compressed air canister in my pocket/bumbag etc, if C02 blows up it sprays a load of gas quickly and can freeze stuff, if a compressed air gets damaged and blows.....well if it happens suddenly enough it can be like a small explosion.