Well, this is a funny Facebook post. We often do this kind of mistakes while texting someone in a hurry. In this picture, we can see that someone named Melanie has texted someone to take her shift in navy. She didn’t check whether the number is right. The receiver is amusing. He /she did a little fun with Melanie and said that he/ she is ready to take her place. But later he/she texted her back and told her to prepare for the shift and shocked her. Hilarious! It puts an ironical smile on the readers face.