irrational behavior - hammer banging metal screws, close up, , retro style,

badly banging brutal close closeup cretin dumb efficient err erroneous erroneously error fail failed failure faulty fiasco force genius hammer idiot imbecile incompetence incompetent incorrect incorrectly inefficient invention isolated miscalculation misjudgement mistake mistaken mistakenly moron retarded smartness snafu stupid stupidity tools useless usuccessful waster wrong wrongly