Once you’ve put your donation into the wooden bowl, never ever reach back into he bowl to take back any amount of that donation. Ever. It’s rude, it’s insensitive and it’s not allowed. Once you’ve placed down your donation, it has become mine. If something during the visit changes from the original agreement, you may ask for a portion of the donation to be returned and I may agree to that, but under no circumstances do you reach in and take what you think you should get back. Uh-uh. That’s such douch-baggery behavior.