person A: I couldn't pay for all my groceries and someone came up from the line behind me and paid for the rest. I was so touched!
person B: Wow_comma_ how amazing is that!? I wish someone would do that for me! I mean_comma_ I don't think I buy more than $30 of groceries at a time since it's just me_comma_ but still!
person A: I couldn't stop thanking him and crying.  I was about to put 15 things back and really didn't have enough to cover things for my family of four. There are good people out there and I'm going to pay it forward for sure!
person B: That's a wonderful idea_comma_ I love that! And you know_comma_ if you find you can't quite do the exact same thing for someone else_comma_ you can always donate food to a food bank or something. It's the exact same thing_comma_ and it'll make you feel awesome.