An electric surprise

I definitely like getting the email notification that we have a new online electric bill, and signing on to look at the bill before paying it, and discovering that this month we owe negative $118 due to the refund of the $200 or so in deposits that get returned to you after one year of service and paying your bill on time, which I totally forgot about. Hooray for "free" money! (And they even paid us interest(!) on the deposits.)