Straw

King Richard the Third, [3.5.5-11]. Buckingham. “Tut, I can counterfeit the deep tragedein,/ Speak and look back, and pry on every side,/ Tremble and start at wagging of a straw;/ Intending deep suspicion, ghastly looks/ Are at my service, like enforced smiles;/ And both are ready in their offices,/ At any time, to grace my stratagems.”