Protection from tree-stumps

In the [Paritta Parikamma](http://www.softerviews.org/AIM/parikamma.html) , there is the line: > May you take care in protecting yourselves from the dangers of tyrants, robbers, human beings, non-human beings, fires, floods, demons, **tree-stumps**, thorns, evil planets, epidemics, wrong-doers or heretics; from wild elephants, horses, beasts, oxen, dogs, serpents, scorpions, poisonous snakes, leopards, bears, hyenas, boars, buffaloes, ogres, devils etc., and from dangers of various fears, diseases and disasters. * What dangers would tree-stumps pose? * What would protection from tree-stumps look like?