Why is the clinic office complaining of being paid in pennies?

A recent news story which is below, states that the office clerk called police after a man paid his 25 dollar bill in pennies. Pennies is legal tender. So which is better -- defaulting on payment or paying in pennies? There are 3600 seconds in one hour. counting up to 2500 should take 42 minutes to 45 minutes. If you are being paid 25 dollars for 45 minutes, that is not bad. That's a rate of 33 dollars per hour. Most of us would love to get such pay. Also I wonder, if 250,000 dollars are being paid in cash using 2500 hundred dollars bill, would the merchant refuse to accept? I think he won't call the police for getting 2500 hundred dollar bills?