I have a race tomorrow at 10 am and I was trying to get the pressure right on my tires. Turns out I have a short presta stem on the front tire and when going to pump it up, it went flat. With the design of the pump (it's a wrench force ATB pump)and presta stem, is there any way I can do this, or do I need to go back to the shady LBS that put the tube in and punch the guy?