This is what a high pressure gas main is capable of. This slideshow shows the results of a guy using a post hole digger with out calling for locates and he hit an underground cross country gas pipe. I don't know if anyone was hurt. There was similar happenings as above where we lived in TX. A guy digging with a pole digger hit a line near his house in the country. Two dead. Once where I worked a guy running a backhoe hit an underground high pressure propane line. No one hurt, backhoe destroyed.