When Sam is trying to get people to play for the hockey game when everyone is sick. Look at Trish's shirt carefully. It has a yin-yang. The camera moves away from Trish, then back. Her yin-yang is changed (reversed). Then the camera cuts away from her and back. This time, the yin-yang is gone*! Either Trish can change her clothes at light speed, or there's something fishy at Ocean Shores when people get the Fiji flu....

* Note: The yin-yang remains gone until the end of this episode.