Traffic Jam

After finished shopping and ice skating, we used federal highway on the way back. We got stuck in a terrible traffic jam. So, I asked my friend to use touch n go card because the queue for cash toll is too long. Furthermore we were rushing to my friend's birthday party. I said, "If we don't use the touch n go card, we are going to stuck in the jam, it will take about an hour to pass the toll, and we'll be late for Siti's birthday party. Im affraid she's going to get upset with us. I don't want to scratch our friendship because of this and others might think bad about us.Actually I was using ad populum appeal to indirect consequences is also known as "a slippery slope argument".