My husband just sent me this in an email
" In the first two days I've had it, I have charged over $2,500 on my new Chase Sapphire card. At this rate, I'll be in debt over $457,500 within a year. Or, if my spending keeps increasing the way it has ($400 the first day, $2,100 the second) I'll owe $3.7 x 10^23 by the end of the the month. That's over half a mole of dollars. I think I might need credit counselling help."
(OK. We actually got the credit card because we both just had surgery and figured we'd pay off the bills with a new card to get a sign on bonus. No actual debt or any interest will be accrued.)