A longtime adviser to Gov. Rick Perry, upset over his abrupt firing at a Texas university, admitted Thursday he told staff he would surrender his office keys only if “anyone is man enough to take them”–all while brandishing a pocketknife in what police called a “nonthreatening” way, the Associated Press reports. Jay Kimbrough didn’t deny the confrontation detailed in a Texas A&M University police report, which includes the 64-year-old telling a school attorney to “bring it on.” He was escorted off campus and quoted an Army war hero–”I shall return!”–before riding off on his motorcycle…