Failure to communicate...

Readers may be wondering how I managed to puncture two tires.  I'd only purchased my Jeep Cherokee recently, and the street-tires that it came with had plenty of tread left on them.  "I'll just be really careful when  I drive off-road", I told myself.  Of course, I was thinking of hazards that I might run over, as opposed to those that might puncture the sidewalls as I drove along.  It was the latter that stranded me on that hot summer day.