At a CART site visit last night, Jonett led a great closing activity. She read this text that compares blue whales (like big institutions) to sardines (groups that can change direction quickly. This text is really worth reading.
http://web.mac.com/iajukes/thecommittedsardine/Sardines.html
At the close, she passed out cans of sardines to remind the group members to swim against the group, and eventually the group will change.