I still remember reading a story in school as a child, about a young brave who chases a wild mustang for days on foot across the prairie. Obviously, the mustang could always outrun the boy and often took off at a gallop whenever the boy came within eyesight, but the boy would just keep chugging along, mile after mile, until the mustang finally became completely exhuasted and the boy caught him. Anyway, I still remember the pebble trick from that story.

Personally, I think the mustang could've gotten away if it had used the pebble trick, too. <img src="/images/graemlins/wink.gif" alt="" />