Hi,
Silly question, but wondering if you can pump up your tyre WITHOUT using the pump/valve.
e.g. Make a small puncture, blow it up by mouth/foot-pump then fix the puncture.
Callum
Callum,
I'm not sure if I'm reading your question correctly but it sounds like you are asking if you can repair an inner tube that has a puncture by deliberately making a second puncture and then using your lungs to inflate it. I'm really sorry but that just sounds completely mental, either that or perhaps you need to rephrase your question.
I'm not sure what valve you have but its worth buying an adapter which will convert a Presta valve into a Schrader valve, that way you could use a car foot pump or a compressor to repair your puncture. failing that, you could always buy a new tube, make sure you always keep your pump and repair kit with you whenever you go out for a ride.
Please don't waste your time trying to inflate the tube with your lungs, balloons yes, armbands for swimming yes, inner tubes no......
Mind you, this guy inflates tubes with his nose, so anything is possible.