Could have been trying to scam me into buying a new tire but the other guy wasn't in on it. I don't really know but that's the reason I settled with in my head. They knew if there was a problem I'd come back to the same shop. Common mechanic scam.
Spray something flammable around the rim and light it. That'll pump a flat back up in seconds.
Indeed it will...I've seen it done but haven't needed to do it myself. I carry a co pressor on board my 4x4...did a post on it a while back. I have to really as I air-down often when I off-road.