At a similar event at Qawa Primary School on the Fijian island of Vanau Levu, the girls were cured by:

"[...]a Hindu priest (pandit) who asked the Hindu elephant god for help in appeasing the disturbed spirits of [an accidentally partially bulldozed sacred pool near the school playground] during a public Om Shanti ceremony."

from: OUTBREAK! The Encyclopedia of Extraordinary Social Behavior by Hilary Evans and Robert Bartholomew.

http://www.anomalistbooks.com/book.cfm?id=37

I think the key is to be very solemn and convincing, and to either honestly believe you're effecting a cure, or never let on that you're bullshitting.