Isn't Money... Money?

Often I pay with rolled coins and seem to face the same response. Are you sure there is 100 pennies in the roll? "That's what my coin machine says," is my response! I love the disgusted look on the clerks face.

I am also amazed at the response I receive when I pay with cash... "the pause, the look, the yellow pen (Could it be counterfeit?), the pause, the confused look (I can't count change back!), the slap-back from the receipt!" What was it like before credit cards? Isn't Money... Money?

What are your funny experiences?