three-foot-diameter rocks falling on your head can be dangerous:
"We're now convinced this was a meteor," said Ronald Woodman, director of the Peruvian Geophysical Institute, which sent a team to the isolated site, about 600 miles southeast of Lima, the capital. "This kind of phenomenon can be dangerous, if it falls on a town, or on a house or person. Fortunately, this wasn't the case."
(Hat tip to Benny Peiser.)