Twelfth Night
Why does Festes accuse Cesario of being strange?
act 4
act 4
Feste approaches Sebastian, thinking that Sebastian is 'Cesario'; when Sebastian tells Feste that he does not know him, nor Olivia, whom Feste tells him to meet, Feste becomes rather upset, and accuses Sebastian of "strangeness".
http://www.gradesaver.com/twelfth-night/study-guide/summary-act-4