1. At the end of a phone conversation, both parties awkwardly say far too many goodbyes.
2. When working in customer service and speaking with someone on the phone and you try to say as many goodbyes as possible to entertain yourself and mess with them.
At the end of the conversation, we had a huge goodbye marathon:
You: "Okay bye"
Them: "Take care"
You: "Have a good day"
Them: "Until next time"
You: (especially fun if you can pull this off when working in customer service) "lovvveee yooouuuuu"