Article Photos: Thunder notebook: Kendrick Perkins, Tony Allen have unpleasant exchange 5/77

Oklahoma City's Russell Westbrook (0) takes a shot over Marc Gasol (33) of Memphis in the first half during game one of the Western Conference semifinals between the Memphis Grizzlies and the Oklahoma City Thunder in the NBA basketball playoffs at Oklahoma City Arena in Oklahoma City, Sunday, May 1, 2011. Photo by Nate Billings, The Oklahoman