The context of the following conversation is Robin was certain she was going to make the sale and spent her commission before she had it.  The sale fell though so Robin had put the cart before the horse.:
Robin says Crap. I got this big credit card bill for the beamer's down payment that I can't cover..
The friend responds Robin, why did you do this to yourself..
Robin responds This was the best sale I ever made. I had it in the bag..
The friend responds But you should wait until they sign the contract then you're good..
Robin responds I signed my loan contract days before they signed theirs. I was so sure this was a done deal..
The friend responds Well, next time you should wait.