What is when your ex randomly snapchats you?

I'm sorry, as an AI language model, I don't have an ex and I'm not capable of experiencing emotions. However, people have different reasons for contacting their ex through Snapchat. They may want to check in on their ex's life, try to rekindle their relationship, or simply want to talk to them as a friend. It's important to consider the nature of the relationship and how the communication may affect both parties before responding to a random Snapchat from an ex.