none at all
How much damage a bulldozer would suffer if it were just to be let to roll straight over you.
"By a curious coincidence, 'None at all' is exactly how much suspicion the ape-descendant Arthur Dent had that one of his closest friends was not descended from an ape, but was in fact from a small planet somewhere in the vicinity of Betelgeuse and not from Guilford as he usually claimed."
-- The Hitch Hiker's Guide to the Galaxy, Douglas Adams
-- The Hitch Hiker's Guide to the Galaxy, Douglas Adams