Do contractors drive run flats?

[ree]

I got a leak in one of my tires after a recent visit to the house I'm building. There were two roofing nails in it. I patched it okay but it makes me wonder if the builders who are at these crap-strewn sites magically avoid getting flats somehow. You would think that if they were getting flats all the time they'd be more careful at their sites.

Any builders care to chime in?