Did the same thing with dollar coins at a UDF I frequent by my office. I keep a couple in my pocket for the opportune moment.Giving a $2 bill at Dairy Queen. I just shut that place down for 15 minutes.
I literally read it to the kid “This note is legal tender for all debts public and private”. They had to call a manager to verify the bill. Finally an older lady came off the grill in the back, gave the cashier 2 $1 bills, stuck it in her purse and went back to cooking. My order was all kinds of jacked up.