li10up

What's important, helping the guy or following some unknown code? He asked for a cartridge... and therefore, if you say "here's a pump," maybe he thinks "oh, she's too cheap!" ... pshaw. First off, he probably doesn't (given the choice, he went for the pump) and second... if you need help, it's cheesy to get that picky about your helper. "Oh, excuse me, not a mini-pump - don't you have a road morph?"
Besides, there's that whole weird thing about the CO2 leaking out of the tires faster.
And what if somebody else had a flat tire three blocks down the road?