You randomly meet someone you really want to keep in touch with.
They might be the perfect prospect for your business, your next tennis partner, or another parent who wants to schedule a playdate with the kids.
You search your pockets, wallet, purse, under the car seat, and everywhere else you can think of but OF COURSE! You don't have that paper business card when you need it most.
Yet another reason why paper business cards are a waste of time, money, energy, and space 99% of the time.