When I get it home, I zip the tire off, find an inch-long thin spear of metal sticking through the tire and tube. I patch it up, inflate, deflate, inflate, everything seems to be ok, so I put the tire back on, being o-so-careful that it's balanced properly, and...
I overtighten the damn skewer, stripping the nut and rendering my work useless, especially as it's after seven p.m., City Bikes is closed and no I don't happen to keep extra sets lying around the house.
So I'm on foot today.
Man it's so much slower.