During the liturgy right before the prayer of reconciliation, when abouna bows before the congregation and says “I have sinned forgive me”, reply in a loud voice “Since you’re really sorry I forgive you.” or something to that effect.
Note: This has occurred before. The abouna in question was unable to continue with the liturgy until he had stopped laughing (be warned this may not be a common reaction). Also I was no where involved with the incident.
Not So Spiritual Words 