But anyone who watched Thibodeau coach against former employers like the Knicks and Celtics during his five-season run in Chicago saw that intensity shift into overdrive on those nights, no matter what he said publicly. So one can only imagine the message Thibodeau is delivering behind closed doors to his 6-18 Timberwolves team when he returns to the United Center for the first time as a visiting NBA head coach on Tuesday.