Safety is always a first priority. Our plane was too close to the plane on final ahead of it so our plane initiated a full climb back to a safe altitude. Then the captain emerged from the cockpit and went straight into the bathroom! I was a bit apprehensive until he emerged from the bathroom and announced the reason for the aborted landing and for his dash into the bathroom. He said, I just couldn't hold it until we had time to go around again!" We all know that feeling!