Donations

So mum sis and I were at the airport today, we were suppose to pick our dad up which went totally wrong. That aside, sis and I stopped in our tracks after seeing this in the donation box.
If u can spot the blue note if u know what I'm talking about. These are the possibilities how that note got in there. Generosity is not one of them.

1. Someone dropped it in by accident.(How unfortunate)
2. Some foreigner must have mistook for $5.(Bloody foreigner you think our Singapore currency small?)
Seriously, i have nothing to blog about although i have tons to blog about :(. It sucks being a perfectionist.