Have you been up on Facebook Messenger really late and are now starting to feel the effects of sleep coming on. Even if you are deep in conversation it I just hard to keep your eyes open any longer. One good way to stop a Facebook Chat is to send over the Sleeping Purple Alien Chat Emoticon. When someone receives this in their chat window they will know one of two things is going on. Either that they are being really boring or that you are tired. Just make sure to let them know which one it before you sign off.