Skipper and Mayfly were playing on the bed just now.  I walked in with his harness to get him ready for a walk.  When he saw the harness he tried to get away!  He usually wants to go for a walk and comes right to me when he sees it.  He was running around on the bed trying to avoid me, then jumped down and I cornered him...he did his crouch thing (crouches and goes perfectly frozen). 

The harness fits him, not hurting him anywhere and he hasn't had any bad experiences on the walks.  I did find a sock of mine in the living room after this...maybe he stole it and thought he was in trouble?  Sometimes he acts as if he expects to be hit when he comes to me after being called, too....and flinches if I reach to pet him quickly.