I have had a presta snap too - SO frustrating! Do you carry a spare tire? Did you walk home 5 miles?
*Normally* I would have a spare on me but I forgot to put my seat bag on. The tire actually held air so I gingerly rode it back to the car. I can always put a tube in it (I'm running tubeless) but then I'd have to deal with all that stuff again.

I'm gonna get used to the c02 thingies and/or use a Topeak Morph pump that has a retractable air hose so that I don't jiggle the presta valve and pop that baby off.