Put most writers on the stage in a real live play, and the best one can hope for is petrified participles. Last June, Dick Feagler, cantankerous talk show host and Plain Dealer doyen of Cleveland nostalgia, put his reputation on the line to play American theater's most revered curmudgeon, Sheridan Whiteside, in Kaufman and Hart's evergreen chestnut The Man Who Came to Dinner. Looking like a disgruntled pooh bear in his smoking jacket, Feagler filled the lofty Huntington Playhouse barn with his intoxicating, petulant disdain. His performance was as rough as sandpaper and as invigorating as a plunge into Lake Erie. We envision Feagler next year leading the "Time Warp" in a Jewish Community Center revival of The Rocky Horror Show.