200% return

Mom forgot to bring her handphone today.

So after our shopping and before calling Dad, we search for a public phone in Takashimaya Department Store. We found one and Mom told me to insert a 10cents coin, press the mobile number, say hello to Dad before passing her the phone. Shortly after Mom put down the phone, I heard a "cling" sound and I'm surprised that it return a 20cents coin to us.

I was so excited and showed Mom what I've found. A lucky coin for moi. Must keep, must keep.

When we saw Dad, I told him excitedly about my lucky coin and suggest to Mom that next time we will use a public phone to call Dad instead from her handphone. Then I will have chance to find another lucky coin. What a good idea?